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August 22, 2019

Pure Stocks return to Lucas Oil Speedway on Aug. 31 with complete rules package announced

Pure Stocks return to Lucas Oil Speedway on Aug. 31 for the Larry Phillips Memorial program. (Kenny Shaw photo)
WHEATLAND, Missouri (August 22, 2019) - Following a successful debut as guest class last week, the Pure Stocks are set to return to Lucas Oil Speedway for the August 31 Lucas Oil MLRA Larry Phillips Memorial Presented by Rugged Radios.

"We were all curious how the Pure Stocks would respond to the invitation to race at Lucas Oil Speedway and we found it to be a big success," Lucas Oil Speedway General Manager Danny Lorton said, noting that 40 Pure Stocks entered the August 17 program. "They put on a good show and I think those guys had a lot of fun. We're looking forward to having them back."

The Pure Stocks will run for a $400 top prize as part of the program that features the MLRA Late Models shooting for a $5,075 first prize in that night's main event. The Ozark Golf Cars USRA B-Mods and O'Reilly Auto Parts Street Stocks also will be in action, running $750-to-win features.


The entire program will be recorded and shown, at a later date, on "Lucas Oil Speedway Saturday Night Racing" on MAVTV Motorsports Network and   LucasOilRacing.TV.    


There will be no track registration or entry fee for the Pure Stock class, just pit passes. Gates will open at 4 p.m. for the Aug. 31 program with hot laps at 6:30 and opening ceremonies at 7.


For questions about tickets or camping for any event at Lucas Oil Speedway, contact Admissions Director Nichole McMillan at (417) 282-5984 or via email at


In an effort to put together one set of comprehensive rules for the Pure Stocks combining other area tracks' rules - which Lorton said should allow all area Pure Stocks to compete at Lucas Oil Speedway - the following rules for the class have been announced:   


CONDUCT - Racers and Race Team Members at the Lucas Oil Speedway will maintain an appropriate and professional personal code of conduct at all times. Actions on or off the track deemed by officials to be detrimental to the sport or speedway will be dealt with severely. Consequences for fighting, cheating or other actions deemed inappropriate may include: fines, probation, suspension, deduction of points or any combination of the above. LUCAS OIL SPEEDWAY reserves the right to alter or amend the rules and regulations in the interest of safety, cost control, and/or fair competition. It is the responsibility of each competitor to read and understand the contents of these rules. If there is a disagreement or dispute regarding the meaning or application of these rules, the decision of the LUCAS OIL SPEEDWAY Competition Director shall prevail. No expressed or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. The rules and/or regulations set forth herein are designed to provide for the orderly conduct of LUCAS OIL SPEEDWAY racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules.
No pretense is made for having designed a fool proof set of rules and regulations. The spirit and intent of the rules is the standard by which LUCAS OIL SPEEDWAY events will be governed. The LUCAS OIL SPEEDWAY Competition Director is authorized to decide if an equipment change or modification is an attempt to circumvent these rules. The LUCAS OIL SPEEDWAY Competition Director can and will disqualify a racecar in violation of the spirit and intent of these rules. If this rulebook does not specifically state that you can alter, change, or otherwise modify something on your car, you should consider it a violation of these rules. No part is deemed to have been approved by LUCAS OIL SPEEDWAY by passing through prior technical inspections. The Competition Director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such alteration of specifications. Any interpretation or deviation of these rules is left to the discretion of the Competition Director. His/her decision is final. These rules are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official. All participants, guest and crew members fully understand that racing is inherently dangerous and that they are exposed to risks of death or serious bodily injury.

GENERAL RULES - It is the responsibility of each competitor to read and understand the Lucas Oil Speedway General Track Rules. LUCAS OIL SPEEDWAY rules shall apply at all events. All participants are subject to the rules and are expected to know the rules. An expressed ignorance of the rules by any participant will not be recognized as a valid argument for failure to comply with rules. Approval of any racecar by an official shall mean that the racecar is approved for participation in the event and shall not be construed in any way to mean that the inspected vehicle is guaranteed to be mechanically sound or safe. Be it further declared that officials and/or LUCAS OIL SPEEDWAY shall not be liable for any mechanical failure, nor for any losses, injuries or death resulting from the same. Participants will conduct themselves as professionals. Any unsportsmanlike conduct by a participant shall be grounds for disqualification and/or punitive action. This will be strictly enforced. Drivers are responsible for the conduct and actions of their car owners, crew members, sponsors and family members. Absolutely no alcoholic beverage or other illegal chemical substance may be consumed by a driver prior to, or during, an event. The duration of the event shall also include all support class events run as a part of the overall program. The use, sale or distribution of illegal drugs at any time shall be cause for immediate and indefinite suspension. Any participant who defies or violates the intent or spirit of the LUCAS OIL SPEEDWAY rules shall be considered to have engaged in unsportsmanlike conduct and shall be dealt with accordingly and swiftly by LUCAS OIL SPEEDWAY. All drivers must be at least fourteen (14) years of age (proof of age required). Drivers under eighteen (18) years of age are required to have a signed and notarized Parental Consent Form. The Parental Consent Form must be signed by a parent or legal guardian and must be received by LUCAS OIL SPEEDWAY prior to participation of the driver in any event. LUCAS OIL SPEEDWAY may require any driver to undergo a physical examination by a licensed health care provider prior to being allowed to participate in any event. No equipment or racecar will be considered as having been approved by reason of having passed through inspection unobserved. All racecars must be able to join the race lineup on demand and unassisted or must go to the rear of the lineup for the start of the race. LUCAS OIL SPEEDWAY reserves the right to add to, delete, supersede or modify any rule, exhibit or drawing that the LUCAS OIL SPEEDWAY deems necessary for the conduct of events and/or safety of participants. All amendments are effective on the date of publication by LUCAS OIL SPEEDWAY regardless of when a person subject to the rules receives actual notice of the amendment.  Every driver must inspect the racing surface and the track area to learn of any obstructions or other defects which, in the driver's opinion, presents an unsafe condition for competition. The driver shall report any unsafe condition in writing to an official. Any driver that competes in an event is considered to have inspected the track surface and surrounding perimeter to determine that all conditions are satisfactory. If the driver does not feel that the conditions are satisfactory, the driver should not compete in the event. The driver further acknowledges that he or she is aware that auto racing involves risk, and that by competing in an event, the driver assumes these risks with full awareness and responsibility. All drivers are responsible for registering their racecar for each event in order to ensure their respective starting position in each event. LUCAS OIL SPEEDWAY reserves the right to refuse to accept the entry of any racecar or participant. Furthermore, LUCAS OIL SPEEDWAY reserves the right to revoke or cancel any entry, or any participants claimed right to be on the racetrack's premises, if it is determined that a participant's presence or conduct is not in the best interest of the sport of auto racing, other participants, spectators, track management and/or employees of LUCAS OIL SPEEDWAY. Lighted signaling devices, hand signals or any other equipment or methods used for communication during an event between a non-competing participant and a driver is not allowed. Radios and any other devices used for transmitting or listening are not allowed on the racecar. Exception: Officials may require drivers to utilize a one-way radio to enable audio communication
from officials to drivers. Furthermore, racecars may be fitted with a timing transponder as supplied by officials. No computers allowed on the racecar, including, but not limited to, electronic traction control devices. Any driver found to be using traction control may be subject to a minimum fine of five thousand dollars ($5,000) and up to a lifetime suspension from all events. For all classes at all events, the top four (4) finishers in the main event and any other racecars as instructed by officials, may be required to report to a designated area after the completion of the main event where mandatory and varied post-race technical inspections will be required to take place.

TECHNICAL INSPECTIONS - The top four (4) finishers in the main event and any other racecars as instructed by officials, are be required to report to a designated area after the completion of the main event where mandatory and varied post-race technical inspections will be required to take place. At the discretion of the LUCAS OIL SPEEDWAY official(s) overseeing the event, any participant may be disqualified by the official(s) for violation of any LUCAS OIL SPEEDWAY rule and/or equipment or action(s) deemed to be hazardous to other participants or officials. All racecars are subject to inspection by an official at any time. Any driver whom refuses to allow any inspection by an official, or terminates an inspection in progress, shall be subject to a fine of one thousand dollars ($1,000), suspension from all events for fourteen (14) days, loss of all points earned to-date for the current season and forfeiture of all cash and/or awards earned at the event. Any illegal part discovered through inspection will be subject to confiscation by an official and forfeited by the driver. For first infraction, driver discovered to be using illegal parts of any kind shall be subject to loss of all points earned at the event and forfeiture of all cash and/or awards earned at the event.  For second infraction, driver shall be subject to a fine of one thousand dollars ($1,000), suspension from all events for 14 days, loss of all points earned to date for the current season and forfeiture of all cash and/or awards earned at the event. For third infraction, driver shall be subject to a fine of twenty-five hundred dollars ($2,500), suspension from all events for one (1) year, loss of all points earned to date for the current season and forfeiture of all cash and/or awards earned at the event. Confiscated parts are subject to being sent to manufacturer for inspection. Failure by the driver to surrender any illegal part for confiscation shall result in a separate penalty, in addition to other applicable penalties under this rule. All measurements must be made while the race car is stationary on a flat horizontal surface.

TRANSPONDERS & RACECEIVERS - RaceCeivers and transponders are mandatory. RaceCeivers must be worn at all times when on the track. Transponders must be mounted on the bottom left side front bumper support frame horn area in front of radiator core support area.

SAFETY - Drivers should have in their pit area as part of their equipment, at all times, a fully charged dry chemical, Halon (or its equivalent) fire extinguisher. Ten (10) or thirteen (13) pound fire extinguishers are highly recommended. Driver must wear required helmet, head and neck restraint system, fire suit, fire resistant gloves, shoes and five-point safety harness whenever the racecar is on the racetrack.
Helmets are mandatory and must be certified to Snell SA2010/FIA-8860, Snell SA2015/FIA-8860, SFI 31.1/2010 or SFI 31.1/2015 is REQUIRED. Helmet must accompany driver and racecar at time of inspection. Complete one- or two-piece fire suits of a flame-retardant nature are mandatory. A fire suit certified to SFI Spec 3.2A/5 is strongly recommended. SFI approved fire-resistant gloves and shoes certified to SFI Spec 3.3/5 are mandatory. Fire resistant socks are strongly recommended. The use of a five- six- or seven-point driver restraint system (safety belts, sub-belt and shoulder harness) is required. Factory-type shoulder belts or straps are not allowed. The use of a seven- point driver restraint system certified to SFI Spec 16.1 or 16.5 is strongly recommended. Metal to metal buckles are required on shoulder and seat belts. Shoulder harness must be mounted securely to the roll cage. Where the belt passes through the seat edges, a grommet must be installed, rolled and/or padded to prevent cutting of the belt. Driver restraint systems must be no more than two (2) years past the manufacturer's date. Full-size window net mounted in the left side driver's window opening is mandatory. Window net mounts must be welded to the roll cage. Window nets certified to SFI Spec 27.1 are strongly recommended and must be mounted in accordance with the manufacturer's instructions and technical director's satisfaction. All bars around the driver must have approved roll bar padding. Approved racing arm restraints are recommended. Must be certified to SFI Spec 27.1.
Fire-resistant safety neck collars are allowed. Head and Neck Restraint Devices/Systems are recommended.
At all times during an Event (practice, qualifying, and competition), drivers must connect their helmet to a head and neck restraint device/system certified to SFI Spec 38.1, and must be acceptable to track officials. The device/system must display a valid SFI Spec 38.1 label. The head and neck restraint device/system, when connected, must conform to the manufacturer's mounting instructions, and must be configured, maintained and used in accordance with the manufacturer's instructions.
It is the responsibility of the driver, not Lucas Oil Speedway, to ensure that his/her device/system is certified to SFI Spec 38.1, correctly installed, maintained, and properly used.

APPEARANCE - All racecars must be numbered with large legible numbers on both sides, on top and on the nose and rear panels. Numbers on the sides of the race car should be in contrasting color from the body and be at least four (4) inches thick and at least eighteen (18) inches high. Top numbers should be at least four (4) inches thick and twenty-four (24) inches high. Officials reserve the right, in the public image of the sport and/or LUCAS OIL SPEEDWAY, to assign, approve or disapprove any advertising, sponsorship or similar agreement in connection with any event. All cars must be neat appearing and are subject to approval of officials to compete. By competing in an event, all drivers agree to comply with the decisions of officials in this regard.

1) American made year 1955 or later rear-wheel drive, front engine car, with 101-inch minimum wheelbase.
2) Sports cars not allowed. Example, Corvette or fiberglass-bodied cars.
3) Bodies must be steel OEM panels or steel OEM Stock replacement panels only. Sunroofs must be closed in using steel panel and welded. T-top cars not allowed.
4) Body must match frame and must remain stock appearing and unaltered in stock location. If rust damage exists you may cut the frame at a point no farther forward than the vertical center line of the rear-end housing and replace frame rails with 2" x 3" x .095 rectangular steel tubing (minimum).
5) Year 1970-1982 Camaro may be used; however, you must use a 2" x 2" sub-frame connector under the car only to connect front and rear sub-frames. You cannot under sling the rear end of the car. All rear suspension mounting points must remain in stock location.
6) Rear firewall must be installed to close off trunk area from driver's compartment completely. You may use a minimum of .035 sheet aluminum or sheet steel.
7) Front firewall must remain full and may not be altered in any manner. All holes must be closed off with a minimum of .035 sheet aluminum or sheet steel. Fabricated Firewalls and floor pans are not allowed.
8) All glass, chrome, exterior trim and fiberglass body parts must be removed.
9) Excessive gutting not permitted; however, you may gut the hood, trunk lid, doors, and fenders for reasonable tire clearance, and under fuel cell for fuel escape. Factory metal hoods only.
10) Plastic nose pieces are allowed. Wedge noses are not allowed. This is a stock class!
11) Spoilers, wings, and anything that tampers with normal airflow is NOT allowed! No open holes are allowed in hood.
12) Aftermarket bumpers are allowed. After-market or home-built bumpers must stay within quarters of the body, must have two tethers attached to rear bumper. Bumper edges must be rounded and smooth. Rounding hoops above and below rear bumper are allowed to help protect the fuel cell in trunk. Tubing can be no larger than 1.5 inches (1 ½ inches).
13) Deck lids must be secured using quick-release pins only (nuts or bolts not allowed).
14) All cars must have a minimum 5/16" chain on front and rear of car and easily accessible for towing purposes. If your car is discovered not to be equipped with a tow chain, you will be immediately disqualified for the night and not permitted to compete until a tow chain is added to your car, NO EXCEPTIONS!
15) Side skirts are permitted. Skirts must maintain five (5) inches of ground clearance at the lowest point and not extend above the first body line on the doors and quarter panels.
(16) Car with driver must weigh a minimum of 3,000 lbs. after race. Weights added to car must be attached by weight clamps and will be white in color with the assigned car number visibly painted on. Weights will be attached by a minimum of two 1/2" bolts and weight clamps. Bolts will not be welded to bars or frames. Weight will be mounted inside trunk and in no way mounted high on the roll cage.
17) OEM rear bumper Tailpiece or OEM appearing aftermarket plastic tailpiece required. (recommended to match body). Tailpiece must be trimmed for unaltered trunk lid. No metal fabricated rear tailpieces allowed. Must be covered quarter to quarter, from top of decking down to the rear bumper mounts. Mounts must remain in stock location.

1) Must have OEM/STOCK Steering parts or OEM aftermarket replaceable steering parts. All suspension pieces must be in stock locations. All suspension parts must be stock for the car being used. Lower A- Arms must match car being used as built by the manufacture. Nova A-Arms, Camaro A-Arms or any others cannot be used on any chassis other then what they are designed for. Only shaft-type steering quickeners are allowed. No Sweet or aftermarket quick-steer type gear boxes allowed. Exception: 1978-1987 GM midsize metric frames may use Tubular Upper control arms. These must be stock dimensions and use only stock bolt in replacement ball joints. NO Screw in ball joints. Shafts may be steel or aluminum. Neoprene bushings are allowed. Eight (8)-inch right and 8 ½ inch left tubular upper A-arms may be used on all year 1978 to 1987 midsize Metric frames.
2) No Weight jacks of any type allowed!
3) Independent rear suspensions are NOT allowed!
4) Trailing arms must remain stock, stock length, and in stock location, per car make and model, offset bushings not allowed. If using a 9" Ford rear end, all mounting points must match all mounting points on the rear end being removed. Rear trailing arm bushings must be Rubber OEM type or neoprene. No Midevil type bushings or ball type bushings allowed and cannot be drilled out for softening or altered in any way. Same applies for front A-Arm Bushings, altering of any kind is not permitted, must remain OEM.
5) Racing shocks are allowed. Shock must be in stock location and in stock mounts only.
6) Only one shock per wheel allowed. No heim-end shocks, no Aluminum shocks. Shock adapters that allow heim-end shocks to be mounted in stock location are not allowed. No adjustable or twist type adjustable shocks are allowed. No pressure adjustable shocks of any type are allowed. Shock mounts cannot be altered, cut, re-welded or changed in any way to mount shocks. Re-buildable shocks or take- apart shocks of any type are not allowed. No bulb type shocks allowed. No gas adjustable shocks.
7) If caught altering shocks in any way driver will be disqualified for the night, subject to the track negative points system, and all points and monies will be forfeited for the night.
8) A shock claim is allowed. Competitors may claim another competitor's shock. Competitor being claimed must have finished in the top four in the A-main event in order for claim to be made. The claimer must be a fellow driver and must present the sum of 100 dollars cash to be paid to designated CMS official in the designated technical-inspection area immediately after the A-main event. A maximum of one shock per claimer, per night may be claimed. Only one shock may be claimed on each competing car per night. I.E., drivers A, B, and C cannot each claim a shock on driver D's car all in one
night. Claims must be made not later than 10 minutes upon conclusion of race. Four (4) claims maximum may be made per racing season. Any driver refusing one shock claim will be disqualified for the night and they will forfeit monies and points for that night's competition. On a second refusal, the driver refusing will automatically earn 15 negative conduct points, which automatically bans him/her for the remainder of the year from competing at CMS in any car class!
9) Racing springs are okay, springs must be mounted and tethered in stock OEM location and mounted only, maximum of 15-inch rear springs on both sides. It is required to run the same length on both sides.
10) Weight jacking devices, spring spacers, or spring rubbers of any kind not allowed.
11) Adjustable lowering blocks are not allowed.
12) If utilizing sway bar, it must remain stock, stock length bolts and spacer (same length) on both sides of the front end.
13) Adjustable spring spacer is not allowed on the front and rear. You may cut to fit on front only. If spacer blocks are used on the front springs, they must be the same height and size left and right.

1) A minimum of a six-point roll cage is required with a minimum of 3 driver's door bars and two passenger side door bars. Roll cage must be welded to the frame of car (Camaro's must weld the roll cage to a 6" x 6" x 3/16" steel plate. Plates must be fully welded to floor pan, then drilled and bolted to a 6" x 6" x 3/16" steel plate below the floor pan). Front and rear hoops are allowed.
2) Roll cage must be fabricated from minimum 1 1/2" x .095 wall tubing.
3) IMCA and USRA type roll cages are okay. A maximum of seventy-two (72) inches from back of engine to front edge of rear hoop is permitted.
4) Must be a minimum of three bars in front of driver fabricated with a minimum 3/8" steel rod. It is highly recommended that the driver's door bars are plated with not less than 3/32" steel plate and cover not less than 80% of the door area.
5) Aluminum racing seats only. Seat must be bolted to roll cage only using no less than 3/8" grade eight bolts with flat washers top and bottom of bolts with lock nuts.
6) Five-point safety belts are mandatory. Safety belts must be bolted to roll cage with a minimum of 3/8" grade eight bolts and lock nuts. Safety belt can be no older than two/three (2-3) years old. See the track's safety rules.
7) Ribbon type window nets required; nets must be bolted in on the bottom with a release at the top.
8) Fire extinguishers are required and must be with-in the reach of driver.
9) A master disconnect switch is required and must be mounted behind driver's seat and clearly marked
on and off, and be easily reached from outside of car.
10) Steering column must be in stock location. Quick-release steering wheel is okay.
11) OEM floor may be repaired or replaced with 0.049-inch steel but must remain OEM dimensions. Firewalls must remain OEM and in OEM location.
12) Seat can be moved to fit roll cage location.

1) OEM original type rear end in stock location. Nine (9)-inch rear ends are allowed with stock drum or disc brakes only. Mounting points must match all mounting points on the rear end being removed.
2) Floater rear ends allowed. Hardened axles are strongly recommended for non-floater rear ends. All mounting points must match mounting points on the rear end of being removed. Hubs and drive flanges must remain at stock angles.
3) Gears may be locked, no limited slip, spools permitted.
4) OEM factory original type brakes only. Brake pads must be OEM, cannot be lightened, and must be the same on both sides.
5) Rear disc brakes are allowed. Calipers must be steel, rear rotors must be vented.
6) All 4 brakes must lock up on inspection.
7) Aftermarket pedals allowed and can be moved to fit driver position. Pedal extensions allowed.
8) Steel drive shafts only. Drive shaft must be stock OEM only and painted white with car number clearly marked. A drive shaft loop is mandatory and must be fabricated from a minimum of ¼" x 2" steel strap around the drive shaft no further back than six inches from the back of the transmission.
9) Must have no more than four (4) degrees down pinion angle.
10) Brake bias must front to rear only. Left to right is not allowed.

1) American Racer G-60 KK704 or Hoosier G60 tires mounted on steel wheels only. No 10-inch tires/wheels! Hoosier or American Racer 8-inch Asphalt Takeoffs permitted. No mixing of tire combinations. Tire grooving, siping, and grinding permitted.
2) Bead lock permitted on right side only.
3) No softening or conditioning of tires allowed. All tires must meet a durometer of no less than 55 at technical inspector's discretion.
4) No aluminum wheels. Minimum 1" OD lug nuts. Wheels must be 8" wide and made of steel. Wide-five adapters are prohibited.

1) Battery may be moved and must be securely mounted. If relocated to the driver's compartment, must be totally encased.
2) No voltage-enhancing devices allowed.
3) All wiring shall be neatly bundled and secured to chassis, all wires passing thru holes shall have a Rubber grommet to prevent wires from shorting to chassis ground (rubber nose is not a grommet).
4) Stock OEM HEI or Stock OEM point distributors only with one stock 12-volt coil. No after-market performance parts allowed with the exception of plug wires.
5) No timing retard, voltage reduction, or traction control devices of any kind allowed. Discovery of any aforementioned or like devices found connected to the ignition will result in immediate disqualification and forfeiture of points and monies earned for that night.
6) All cars with a GM Factory Sealed Crate Engine must utilize a soft-touch rev control box MSD part #8727CT with a 5500 RPM Maximum limit. Ground wire must be ground by itself in visible site for inspection. Plug must remain and cannot be removed.

1) Pump gas only. No racing fuels. No alcohol. Fuel must be gold or clear in color and not exceed 93 octanes. E-85 or other like alcohol fuel is not permitted. 91 octane alcohol-free is permitted.
2) Fuel cells are mandatory; maximum of 22 gallons. Fuel cells must be encased in an approved metal container of no less than 20-gauge steel. Fuel cell must be mounted in trunk area of car only using a minimum of two 1 ½ x 1/8" steel straps wrapped completely around cell and mounted to chassis of the car. Bottom of fuel cell must be set in car no lower than bottom of frame rail.
3) All fuel lines must be routed neatly under the car and kept above the bottom of the frame rails at all times or through the interior of the car, if so; lines must run through steel tube. Fuel cell must have a flapper valve.
4) All fuel pumps shall be mechanically driven and bolted directly to engine block in stock location. No electric, belt drive, or rear drive fuel pumps allowed.
5) No pressurized fuel systems allowed.
6) Fuel pressure gauge lines may not enter driver's compartment; isolation system must be used.
7) Fuel additives or scents are not permitted.
8) A Fuel test reading of "0" will be used, any fuel with a positive test number will be a DQ.

1) Cast Iron OEM Quadra jet or 2-barrel intakes only, no marine or Bowtie Intakes allowed. No aluminum intakes allowed except for aluminum intake Edelbrock Chevy #2101, Ford #2121 or 2181, 2839, Chrysler #2176 or 3776. Intakes cannot be altered, ported, or polished.
2) Carburetor part #0-4412, 500 c.f.m. model only. Must be stock and pass a go, no-go gauge. No down leg boosters and no altering of booster cluster. Throttle shaft must remain stock and must not be thinned or cut in any manner. Stock throttle plates and screws, must not be thinned, cut or tapered Maximum throttle bore 1 11/16" and maximum Venturi bore 1 3/8". No modification of carburetor. No boring or polishing of throttle or Venturi bore allowed. Use carburetor adapter Mr. Gasket part #1933 or #1929. No HP carbs allowed.
3) One (1) inch spacers only. You can also use in place of the Mr. Gasket adapter a one-inch spacer plate is allowed. Spacer plate holes must go straight through and cannot be tapered (No Tolerance). No flow design, HVH, or Wilson-type spacers allowed. Spacer may be aluminum or phenolic. Maximum thickness 1- 3/16ths inches spacer plate and gaskets. No carburetor claims.

1) The engine rules for the Pure Stock class are intended to be completely stock. Factory OEM or After- market "Performance Parts" or engines are strictly prohibited. Stock Compression Motors Only! All internal engine parts must be OEM dimensions and weights. All Crankshafts and Connecting Rods will be Stock OEM in appearance and type. Any Crankshafts or Connecting Rods that are used, that are not OEM produced cannot be polished or coated in any way. Connecting rods must be "I Beam" and cast only and must have all casting lines in them if that's how they appear stock OEM. Rod bolts must be OEM type, NO cap screw bolts allowed.
2) Must have V-8 engine, OEM size configuration. 360 cubic inch maximum.
3) No stroker motors.
4) GM Factory Sealed 602 Crate Motor only will be allowed, utilizing 2bbl carb 4412 500cfm only and must utilize a soft-touch rev control box MSD part #8727CT with a 5500 RPM Maximum limit. Ground wire must be ground by itself in visible site for inspection. Plug must remain and cannot be removed.
5) Engine in stock location, no moving motor back, down or up, same brand as car GM to GM, Ford to Ford, etc. Motor mounts will be in stock locations only.
6) Flat Top or Dish Pistons only. 9.0 to 1 compression max.
7) Cast iron stock production OEM heads only, 76cc minimum, No aftermarket heads allowed, No EQ, no double hump, no angle plug or no Vortec Heads allowed. Screw-in studs and guide plates are allowed. No Porting, polishing, bowl cutting, milling or altering of any kind. GM maximum value size 1.94 intake and 1.60 exhaust value maximum. 305 heads on 305 motor only.
8) Stock rocker arms, 1.5 stock ratio must be maintained. Steel roller-tip rocker or stock rocker arms only. Poly locks are allowed. Stud girdles are not allowed. Must run 0 valve lash and rocker nuts must be back off 3/4 turn before 0 valve lash. Head Combustion Chambers can be no smaller 72-cc. Any Factory OEM Performance head is not allowed. The OEM Machined Flat Boss on The exhaust side of the head can be no closer than 1.170" to the deck of the block. Intent is to help stop over milling of the head surface and increasing compression.
9) Smooth idle cams at 1,000 rpm and must pull 15 inches of vacuum, Camshaft will have no more than .288" lift at the camshaft and no more than .430" lift at the valve. No roller cams, no solid lifters, hydraulic lifters only. No anti-pump up lifters. All camshafts should be OEM only and stock. Camshaft can have no more than .285" lift at the camshaft and no more than .430" lift at the valve MAX. Any Performance, R.V., Z-28, RT, GT or any Factory OEM performance cams are not allowed. Manufacturer's numbers must remain on the cam for identification. Any numbers changed, altered, or removed on the cam will result in immediate disqualification and forfeiture of all points and monies earned for the night.
10) Any cast iron exhaust manifold allowed; Headers are allowed. All tubes must go into the same collector. Tube diameter can be no larger than 1 5\8" and cannot be a stepped header. Headers must remain inside the frame rails left and right. No wheel - well or fender exit headers allowed. No cones.
11) Aluminum Radiators Allowed.
12) Transmission must remain completely stock. OEM Transmissions cannot be altered in any way. No After-market Racing Transmissions of any kind allowed. Anyone caught using a racing transmission of any kind will be immediately disqualified for that night and will forfeit all points and monies earned. Discrepancies found will be subject to re-inspection upon returning to competition.
13) Standard must have all working gears and stock OEM clutch, minimum 10 and a 1/2-inch flywheel and pressure plate. Cast iron bell housing or explosion-proof bell housing highly recommended. Automatics must have all working gears with OEM working torque converter. No converters smaller than 10 inches.
14) No aluminum or Corvette components. Flywheel must be stock type OEM only, no Lightened Flywheels or Flex Plates allowed. Hydraulic clutch slave cylinders and aftermarket clutch master cylinders are allowed.
15) Automatics must have all working gears and OEM only, Full size OEM stock torque converters only. Stall type torque converters of any type are not allowed.
Danny Lorton
Lucas Oil Speedway General Manager
Office: (417) 282-5984