•W-1. Any year, front engine, over 107 ½' wheel base, hard top automobile or station wagon is allowed. No trucks, imperial, Jeeps, hearse, 4X4, SUV's, or carryalls.

W-2. Tires: Any
W-3. Aftermarket or modified Rear-ends 8 lug or less are allowed. Axles made with dual bolt patterns may run up to 10 studs and nuts. Trailing arms must be mounted in factory location on the frame and must be free to travel.

W-4. Engine and transmissions swaps are allowed. Aftermarket shifters and homemade up to max size 4x4 cross members are allowed. You may weld angle 4”wide by 6” long to the frame to mount cross member. The bottom of the oil pan and transmission may have a skid plate 24 inches wide and can not go a past oil pan sump and no farther back then the transmission pan. It can not touch the crossmember. Stacks must point up or down, not forward, backward, or to the sides.

W-5. No full engine cradles (engine armor). You may run a lower engine cradle with pulley protector and transmission protectors allowed. Must be skeleton tube style. 

W-6. You may run a simple distributor protector no halo, no carburetor protector, nothing wider then the engine, and nothing down the sides of the engine no mid plate. You may run a slider drive shaft.

W-7. Steel bells are allowed but no transmission brace.

W-8. Bumpers may not be homemade and must be stock appearing from the front and have factory skin. You may add any material to the “INSIDE” the bumper. You may fold and or weld any seam in the bumper and may use any year “CAR” bumper but you may NOT alter the shape or contour of the bumper. No trailer hitches allowed. No Chrysler “pointy” bumpers allowed. Bumper shocks may be collapsed and welded. You may build a shock by welding metal to the bumper and sliding it into frame no more than 10 inches. Must be inside of the frame. Factory holes must be left open. Core support mount must remain in stock position and both welds must stay factory. Bumpers may be flipped over. Bumper height max. 22" (front) and minimum 15" (rear) measured from bottom of the bumper to the ground. On 1971 to 1976 Pontiac, Buick, Oldsmobile you may change bumper mounts to Chevy cup style (shock boxes) on the front but no excessive welding. On rear bumpers two piece of up to 2” by 8”strap per frame rail may be welded to frame rail ('71 to '76 GM wagons to bumper shock bracket) body may weld to body.

W-9. Driver's door may be welded solid and must have safety bar. Inside of drivers door may be plated for drivers safety. All other doors must be fastened with wire only. Unlimited wire on doors may run from sheet metal to sheet metal only, not frame and not in window openings. Both front doors must contain car number in contrasting color.

W-10. Steering components may not be altered other than steering columns which may be altered from gear box to steering wheel. No altering or reinforcing suspension components other than rear control arms may be aftermarket or braced.

W-11. CAGE 

1. You may have a cage surrounding the drivers compartment with a roll over bar. Bars 6” dia. max. must be sheet metal to
sheet metal only you may use 10” X 10” X ¼” plate to attach bars to sheet metal. The gas tank protector cannot go past the
package tray.
2. The dash bar must be 5” from center of firewall the bar behind the seat can sit no further back than where the kick panel
meets the bench seat and must be at least 5” off the floor. 
3. Roll over bar must be straight up and down no angling permitted you may use a gas tank protector they can be 32” wide and
extend to sheet metal. 
4. Door bars may be no farther forward than the firewall and extend into rear doors on 4 door cars they  Must stop 2” from back
of door on 2 door cars they must stop 3” from rear wheel well on the body the  Rear of these bars must be free floating and
may not attach to body. You may have gussets in cage at   the corners. You can have two, one per side down legs welded
from cage to frame but must be centered in both front doors.

W-12. You may tilt box only by cutting the welds and re-welding. No more then 3/8 bead of weld. The flaps can’t be beat back/formed to the frame. You may add a factory guest in a non guest car. Must be factory to that car year. 03 and newer can not be tilted You may notch or pre-bend rear frame. No hump plates allowed. You may chain or wire hump to hump.

1. You may go around frame and bolt chain or twist 9 wire. No bigger then 3/8 chain. No more then 5 strands of wire.
2. You can use one of the fix it plates per frame rail and weld your chain to it or a angle with a hole in it for your 9 wire.

W-13. Core Support / Radiator: You may change core support bolts with up to a 3/4” bolt and add up to 5” spacers, bolts may extend thru hood but not bottom of frame and no washers may be welded in place. No homemade radiators. Radiator must remain in original location and must be filled with water only, no antifreeze. No radiator “tank” protectors (tanks must be exposed). Radiator may be mounted with one piece of steel (maximum of 3”) per side to core support or wired in place. No adding anything in the center across the top of the core support. You may use a/c condenser, screen, or expanded metal in front of radiator but may not be welded or excessive. Bolted or 9 wire. 5 spots total. Overflow hose must point down. You may cut and reweld to raise bottom of core support up to get height for radiator.

W-14. Hood and trunk must a have minimum of 12” inch inspection hole. Hood may be held down with up to 4 double strands of #9 or smaller wire and the two core support bolts, or up to six double strands of wire only. You may remove or cut trunk lid (or tailgate) in half. Trunk lids may be wired in up to 8 places with single or double strands of #9 or smaller wire sheet metal to sheet metal only. No welding washers or other material to any sheet metal. If you choose to not run a trunk lid (or tailgate on wagons) you may not use any wire in that area.  Rear window bar no bigger then 2x2 tube. You can weld it to a 3x3 by 1/4 plate to trunk lid only. Not package tray. No farther back then 12 inches from Drip edge and package tray. Must bolt to the roof. You may push the trunk down and must stay on factory drip edge. A bar or wire is mandatory in windshield area. If a bar is used must be left or right of the DP.

W-15. You may change the body bolts up to ½” bolts and 3” washers. Must be 1” space between body and frame. No welding washers to any sheet metal.

W-16. You may add up to four double strands of #9 or smaller wire from the core support to the bumper, not through the hood. You may add up to 2 strands per side #9 or smaller wire from front fenders to core support (sheet metal to sheet metal only), no washers welded to sheet metal or core support).

W-17. Fuel to be gasoline only, no alcohol. Only tanks permitted are STEEL (NO PLASTIC) boat tanks or metal fuel cells and must be mounted in the area of the back seat and suitably covered. Rubber and steel lines can be run under floorboards. Steel lines may run inside the car. Rubber lines inside the car must be run inside another hose. ALL FUEL LINES AND TANKS WILL BE AT THE DISCRETION OF THE INSPECTORS! Vehicles requiring electric fuel pumps must have an operational fuel pump kill switch. All original fuel tanks must be removed.

W-18. Suspension jack screws (twisty jacks) or other material may be used in coil springs but suspension must move up and down. You may change a-arms on 92 to 02 to 80s style. Must use same factory brackets that are on the year your changing. That means no weld older style brackets on newer frames. No chaining up or down any suspension or welding to any support. Where applicable leaf springs must be equal to or less than factory stock and have no more than 6 clamps per side. Rear shocks must be working "factory manufactured shocks". No coil spring to leaf spring conversions. Watts link conversions on 98 and newer cars are permitted you must use 1⁄4” X 2” X 2” square tubing or 2” round pipe for rear trailing arms .Upper and lower mounting brackets uppers must be mounted to the package tray and lowers must be mounted on side of frame. (Cannot be mounted inside or on top or bottom of frame) can be no larger than 7” X 7”. If you run a sway bar it must be mounted in the factory position the ends can be heated and bolted to the a-arm with no bigger than a ½” bolt. Must have a 1” gap from pulley protector.

2003 and newer cars will run factory aluminum cradle with factory rack and Pinion steering you cannot change suspension components. Must stay factory suspension you may change steering column from rack and pinion to the steering wheel to an aftermarket style.

W-19. Cars can be creased.

W-20. Pre ran cars ONLY maybe re stubbed at box only no added metal DONT OVER WELD OR IT WILL BE CUT!! You are allowed total of 6 4x4 1/4 inch fix it plates on Fresh or Pre Ran cars. 3 per frame rail.