Rules locked, 2023,2024,2025

With the exception of Safety requirements approved by the Board.

Must also follow all general rules listed above.

Engines:

1. Maximum single 514 cubic inch 1% tolerance, naturally aspirated V8 engine.

2. Cylinder heads: two valves and one spark plug per cylinder. Aluminum heads are allowed. No

less than 24 degree head. No Hemi heads.

3. Legal aluminum heads: CHEVROLET: dart–320, 360, and Pro 1, Brodix 1 & 2, and all

Edelbrock. FORD: Cobra jet, Blue Thunder and TFS A460. CHRYSLER: Indy 444–1. Not

limited to these heads, but must meet A & B.

3a. Must have cast aluminum manifold.

3b. Must except stock rocker arm assembly.

4. The front of the engine block cannot extend more than 160 inches forward of the center of the

rear axle or 20 inches forward of the center of the front axle.

5. One carburetor, gasoline only, no pressurized fuels, no methanol.

Harmonic Balancer:

3. All engines must be equipped with a harmonic balancer or dampener meeting SFI

Spec18.1.

4. All vehicals are required to shield all rotating mass mounted on the front of the

crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to

bottom. Shields to be a minimum of .125” steel or aluminum fastened by at least 2

evenly spaced 3/8” grade 5 bolts.

Hitches:

1. Maximum height 30 inches.

2. Minimum 36 inches behind center of rear axle.

3. Maximum 48 inches behind center of rear axle.

4. Pivot point of the hitch can not be forward of the center of the rear axle.

5. Must be rigid at all hook points.

6. Must be no smaller than a 3 ¼ deep 3 ¾ wide opening at the hook point.

Tires & Wheels:

1.Can run any size street legal DOT tire. Maximum size 35x12.50 or 315–70–16 metric. Can run

34X18.0X15 pulling tires allowed.

2. No split rims; snap rings or dual wheels.

Transmissions & Drivelines:

1. Stock altered frames. No tube chassis.

2. Maximum wheel base 140 inches center to center.

3.All u–joints and yokes must have a 360 degree cover, at least 6” long (covering entire yoke and

u–joint), 1/4” thick steel (3/8” thick aluminum). Inside diameter of shield will be no more than 2"

larger than u–joint. If cover is cut in half it must be fastened no farther than 1” from ends with at

least 3/8”– grade 8 bolts. Must be bolted a maximum of 6” from bolt to bolt. All intermidiate

shafts need covered 360 degrees. NO HINGE STYLE fasteners permited. Must be securly

fastened.

4. Drive shaft loops required (3/4” or wide), 1/8” or thicker steel (1/4” or thicker aluminum). No

more than 2” larger than the largest u–joint. If cut in half, must be bolted within 1” from ends and

a maximum of 16” apart from loop to loop (multiple loops). If using a one piece cover it must be

bolted a maximum of 6” apart the entire length and at least 1” from ends. All fasteners must be at

least 3/8”– grade 8 bolts. NO HINGE STYLE permited. Must be securly fastened.

5. Must have a fully enclosed S.F.I. approved explosion proof bell housing on standard

transmission.

6. Must have S.F.I. approved flywheels for both automatic and standard transmissions.

7. Automatic transmissions must have S.F.I. approved flywheel shield and transmission blanket,

or tunnel shield.

8. Any rear axle is allowed.

Weights & Safety Rules:

1. Weights can be mounted anywhere on the truck in safe manner. No Loose weights in cab.

2. Weights cannot extend more than 60 inches forward of the center of the front axle, or any part

of the truck.

3. Driver must wear seatbelt.

4. Batteries must be in protective case and must have a battery disconnect switch on outside if

mounted in front. No batteries in cab.

5. Must be mounted and working fire extinguisher in the cab.

6. No gas tanks in the cab.

7. Must have working kill switches and they will be checked.

8. Brakes must hold vehicle.....steering brakes are allowed.

9. Must have radiator overflow.

10. Drivers must be at least 16 years of age and have a valid driver’s license.

11. No car bodies, vans, blazers, broncos, or fiberglass bodies allowed. With fiberglass hoods

being the only exception.

12. Hood required covering as much area as possible.

13. Engine side shields required (.100 for steel and .125 for aluminum), unless inner fenders are

installed.

14. No holes in firewall or floor larger than 1 inch.

15. Balancer must be S.F.I. approved or covered 360 degrees.

16. Nerf bars at least 8 inches behind clevis or body to prevent injury.

17. Fuel tanks are allowed to be in front of vehicle if they are S.F.I. approved and have

braided hoses and pressure coupler.

18. 2wd– must have wheelie bars. Maximum ground clearance of 6", and 18" behind rear end.

19. All drivers are required to wear full face helmets, jackets, pants with a SFI rating of 3–2a–1and 3.3/5 shoes

 recommended.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE

TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE

OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all of the

rules! Every vehicle will be teched on a random basis at some point

throughout the season.**