SUPER STOCK FOUR WHEEL DRIVE RULES:
1. Trucks must have all original factory sheet metal exterior and have a stock outside appearance. Fiberglass hoods allowed. Box floor may be eliminated. The top of box and tailgate area must be completely covered. (2008) It must have factory windshield and rear cab glass. Side glass is optional. Hood scoops are allowed. It must have front inner fender wells and/or 1/8-inch steel or 1/4-inch aluminum engine side shields that are high enough to cover spark plugs. The truck must have OEM factory frame. (2009) Drivers compartment must be fully enclosed.
2. Truck’s engine must be same manufacturer as truck. Maximum 535 cubic inch displacement.
3. Any single four-barrel carburetor allowed.
4. Any single four-barrel intake allowed. No Tunnel Rams, PRO Rams or sheet metal intakes allowed. Intake must be production cast and readily available to all competitors.
5. Engine may have any cast iron or aluminum head allowed, except Pontiac Big Chief, Olds Big Chief, Dart Big Chief, Brodix Big Duke, Ford C460, Ford E460. No pro-stock heads, hemi-heads. Chevy and Dodge can run any Siamese cylinder head, Ford can run any A-style head. No 5 inch bore spacing. (2009)
6. There will be no electronic traction control that alters any engine functions. Factory sealed CD ignition boxes are allowed. Data acquisition is allowed, but there can be no connection to the ignition system. (2010)
7. Open exhaust and open headers allowed. Exhaust must exit parallel to frame, lower or through hood.
8. Electrical fuel pumps, fans and water pumps allowed.
9. Trucks must have functional front suspension. Rear suspension may be welded solid. Blocking is allowed when springs are present. Traction bars and multiple shocks allowed. No altering the wheelbase. Maximum wheelbase 133 inches. Any single speed rear end allowed. Any single speed front axle allowed.
10. Rear end must be mounted solid with not Watts links.
11. Aftermarket Pro-Fab style transfer case allowed with single speed gearbox. Stock manual transmission with Quick change style transfer case, no internal modifications and only one useable forward gear is allowed.
12. Heavy duty clutches, stall converters and shift kits allowed.
13. Weights may be mounted to front of truck, but cannot exceed 60 inches from centerline of front axle. Weights must be secured during pull. Fuel tanks and battery may be mounted on the weight bar.
14. Hitch must be rigid in all directions at all times. A hitch angle of 0 to 30 degrees maximum is allowed with no leeway. This will be measured from hook point to hitch attachment point on the frame. Draw bar length, measured from center of rear axle to hook point, will be a minimum of 27% of truck wheelbase. Steel hitching device will be no more then 1 1/8 inch thick, no less than 3/4 inch thick. Hitch height is not to exceed 26 inches. It must be visible, clear hook mounted in horizontal alignment. All hitches will have only one adjustable supporting point and it must be located no more than 6 inches from hook point. That supporting point, if mounted to frame, must be vertical if the attachment is from above or below. If attachment is to the rear end, it must be at or below the center point of axle. (2007)
15. All trucks must have centerline tab welded on rear-end housing (representing center of axle and to be approved by tech committee) to allow hitch length to be measured when hitch height is checked.