8000 LB. MODIFIED DIESEL 4X4 TRUCK

1. Must use stock frame for make and model of vehicle. No tube or aftermarket frames.
2. Wheelbase maximum of 158". Rigid suspension, drop boxes and reversers allowed.
3. Hanging weights allowed. Weights must not extend more than 60" from centerline of front axle. Weights must be secure.
4. Tires and wheels must stay in center of wheel wells as intended by manufacturer.
5. All u-joints must be shielded 360 degrees with 3/8" thick aluminum of 5/16 steel. Shield shall be 6" wide and centered on the u-joint. Inside diameter of shield shall be no more than 2" larger than the u-joint.
6. All intermediate shafts between the transmission and transfer case shall be totally enclosed with 3/8" aluminum or 5/16" steel. One forth of the shaft may be visible.
7. Axle shields are not required.
8. Hitch height to be maximum of 22" off ground. Hook point to be a 3" diameter ring or clevis.
9. Minimum hitch length from center of rear axle back must be at least 36% of wheelbase.
10. If bed is too long it may be cut to accommocate the 36% hitch length rule. Hitch must be clear for hookup.
11. Maximum tire height is 35". Must use D.O.T. approved tires. Must have a D.O.T. number moulded on the tire. No cepecks allowed. Cut or sharpened tires allowed. Dual rear tires are not allowed.
12. Exhaust must exit straight up, stack length minimum of 12 inches from top of hood. Pipe must have (2) 3/8 grade 5 bolts mounted in a cross pattern in the vertical pipe.
13. Engine must come from the factory in a one ton or smaller pickup truck. Maximum engine size shall be 460 cubic inches. Mechanical or electronic injection allowed.
14. No nitrous, propane or alcohol allowed - #2 diesel fuel only. Water injection allowed.
15. Turbochargers limited to 2 stage configuration.
16. All engines will have deflection shields running the complete length of the block casting. Shields must be securely fastened and must be .060" thick.
17. SFI bell housing blanket and/or SFI blowproof bell housing required. NO cast iron clutches or flywheels allowed.
18. Air shutoff required - At the rear of the truck to be operated by the sled and also a control inside the drivers compartment.
19. Fire extinguisher, Snell 85 or better helmet, SFI suit, and seatbelts required.