The rules and/or regulations set forth herein are designed to provide for the orderly conduct of 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 EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND OR REGULATIONS. They 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.

The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his/her opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation of deviation of these rules is left to discretion of the officials. Their decision is final.

The Management of Huntsville Speedway


Safety Rules

  1. Apparel- Also See General Rules.
  2. All safety apparel must be worn while on the racing surface. This will be enforced for practice and race dates.
  3.  Driver must wear eye protection under race conditions. (ie goggles or face shield)
  4.  Neck brace is recommend.
  5.  Must have functional quick release steering wheel.
  6.  Car must pass a safety inspection by Huntsville Speedway and maintain throughout the season.
  7. All safety apparel must be worn while on the racing surface. This will be enforced for practice and race dates.
  8.  Radios Recommended.


General Rules

  1.  All starts will be double file, cone rule will apply on restarts.
  2.  Restarts with less than 5 laps to go, will be single file.



365 cubic inches or less = 2,950 lbs.

366-385 cubic inches = 3,100 lbs.

386 or larger = 3,200 lbs.

602 Crate = 2,900 lbs. (Subject to Change)

Any car that has the stock firewall and floor pan complete will be given a 50 lbs. weight break.

Any car with the motor set back further than the rule allows will be required to carry not an extra 50 lbs., but 50 lbs in front of the flywheel. No further than 4” from stock location.

Any car running with a non factory steel roof will be required to weigh an extra 25 lbs.

Any car running a body that is more than 75% aluminum panels will be required to add an extra 25 lbs.

Any car running with a complete fiberglass body will be required to weigh an extra 100 lbs.

Any car that might not have a complete fiberglass body, weight penalties will be assessed by HS officials.

  1. Maximum 56% left side weight.
  2. May add weight boxes to the outside of the frame rails with safety bolts in the front and rear.
  3. All weight must be painted white with car number on it.
  4. 50 lbs penalty for under slung chassis.
  5.  Driver must post their claimed weight at all times in the top left corner of the windshield in 1.5” tall numbers.  Numbers must be easily visible to HS officials.  White vinyl numbers are preferred.
  6.  No fuel burnoff allowance.


Competing Models

  1. Any American made cars
  2. Minimum wheelbase of 106”. 104” wheelbase will be allowed with a additional 50lb penalty.



  1. Full magnetic steel body. May use aftermarket front and rear bumper covers.
  2. Fenders and quarter panels may be cut for tire clearance. Front inner fender panels may be removed.
  3. All hoods, trunks, and rear hatches must be securely fastened. Doors must be welded closed. No under panning permitted.
  4. Front ¾ of air cleaner can not be expose to outside air.
  5. Must have stock grill or screen mesh wire.
  6. Minimum roof height 48”.
  7. Maximum spoiler height 6” x 60” wide.
  8. Minimum body clearance 4” to ground.
  9. Must have full front lexan/polycarbonate window 1/8 of inch minimum, side and rear windows 1/8 of inch minimum recommended.



  1. Stock passenger car spindle; may be reinforced.
  2. Frame may be reinforced. No notching or alteration to mainframe rails.
  3. Any style sway bar other than a splined bar. Can run eye bolts on frame.
  4. Wedge bolts permitted.
  5. May run after market upper A-arms and upper A-frame mounts.
  6. Lower control arms must be stock AND must be in stock location.
  7.  Stock front clip only.  Stock type steering gear box only.  No rack and pinion.
  8. Steel non-adjustable shocks ONLY. Maximum retail costs of $140.00.
  9.  POST RACE SHOCK BUY OUT – $125 per shock.  Buyer must buy all four shocks at time of protest.  All four shocks must be delivered to tech official undamaged and fully functional.  Any person who does not submit to the claim rule will be disqualified.  No points, No money.  Also they will not be allow to bring those shocks back at any time. Driver claiming shocks must have competed at HS the last two scheduled events and finished on the led lap.  IF YOU DO NOT WANT YOUR SHOCKS CLAIMED, DO NOT EXCEED THE RULES.
  10.  No internal or external bump stops, frame stops or suspension limiters of any kind.
  11. Minimum frame height is 5 inches.


Interior Safety

  1. May run front loop bar tied to cage with one bar in front of A-arm.
  2. Driver must have racing seat in car.
  3. Must have a 2-pound minimum fully operational fire extinguisher with a gauge and with an all steel quick release mounted securely in car within reach of driver while belted in car.
  4. Car must have (4) point roll cage with diagonal bar behind driver with (3) roll bars in left door & (2) in right side door minimum.
  5. Top of roll cage may extend to rear frame behind fuel cell.
  6. Roll bars must be 1 3/4 inch diameter and .095 gauge tubing. Gussets required in left door bars. Bars must be padded in driver’s area (legs & head bars & side bars).
  7. Front hoop bar must not extend past radiator support.
  8. Rear view mirror allowed.
  9. Left side window net is required. Must have a quick release from the top.
  10. May run solid engine and transmission mounts.
  11. Fuel cell required, 22-gallon maximum.
  12. Must be mounted in a safe and approved manner, securely strapped by placing two (2) straps long ways and two (2) straps crosswise around tank and bolting straps to trunk floor. Straps 1/8 inch x 1-inch thickness in width. Must be mounted in center. Bar protecting fuel cell must be no lower than 1 inch below fuel cell. Bottom of fuel cell must be no lower than 8 inches from ground. Mounting must be approved by the HS track official.
  13. Must have rollover check valve.
  14. Must run Huntsville Speedway fuel. 110 octane, no E85. No fuel additives allowed.
  15. All wheels must have four working brakes. Brakes are to be single piston caliper Stock style only. No Aluminum.



  1. Stock type 2 or 4 eyebrow flat top or dish pistons (cast, forged pistons or hypereutectic pistons).
  2. Solid or hydraulic lifters allowed. No mushroom lifters allowed. No roller cam/lifter allowed.
  3. Stock cast-iron head as available from manufacturer (Dart S/R head, World Products SR043610 allowed). No porting or polishing. 55cc (+/- 1cc) maximum valve sizes: 1.94 and 1.50 allowed for Chevrolet, 1.94 and 1.60 for Ford, and 2.02 and 1.06 for Chrysler. Screw-in studs, guide plates and stud girdles allowed.
  4. Aluminum or cast iron intakes allowed. (No porting or polishing).
  5. Crankshaft height 12 inches.
  6. Only one non-adjustable one-piece solid aluminum carburetor spacer permitted maximum 1” in height, with one paper gasket per side not to exceed .065” in thickness. No taper or beveling permitted.
  7. No GM angle plug heads.
  8. Holley 500 cfm# 4412. (No modifications allowed).
  9. Down draft and cross over headers only. No 180-degree headers,  NO Iron Lung Type Headers.
  10. Full roller rocker arms allowed.
  11. MSD ignition allowed.  No aftermarket crankshaft trigging systems allowed.
  12. Number one spark plug must either be lined up with or in front of left side upper ball joint. If the motor is setback is further than this rule states the car is required to bolt fifty pounds in front of the flywheel. No more than 4” setback will be allowed from stock location.  See weight rule.
  13. On non-crate engine, cold air boxes are not permitted.


Crate Engine

  1. Factory sealed 602 with box stock 650 cfm carb or 500 cfm 2bbl only. Allowed must meet stock GM yellow book specs.


Clutch and Transmission

  1. All transmissions must be stock OEM and least two working forward and one working reverse gear.  No straight cut gears permitted.
  2. Aluminum bell housing allowed with a minimum of 7¼ inch clutch assembly and FSI flywheel.
  3. Stock automatic transmissions are allowed as long as all gears are working and minimum 10” fully functional torque converter.
  4. Must have an all steel approved safety bell housing for stock diameter clutch and flywheel assembly.


Rear End

  1. No quick change rear ends. NO Lightweight or gun-drilled axles. NO aluminum rear axle parts permitted.
  2. Aftermarket top links allowed. Can not be any longer than 18” measuring from center to center.
  3. Rear end brackets on frame side must remain in stock location, brackets on rear end allowed a maximum of 2” slot.
  4.  Three and four link rear suspensions permitted.


Tires and Wheels

  1.  American Racer KK704.
  2.  Steel 8” racing wheel allowed.
  3.  No wheel adaptors.
  4.  No wheel weights allowed.
  5.  No air bleeders or pop-offs.
  6.  Must have 5/8” studs and 1” lug nuts.