The motor must remain stock, meaning nothing can be done to it. It must be completely stock in both form and function. If you want to put an LBZ motor in your LB7 so you can get better rods, that is fine, but you have to do it with LBZ pistons. No swapping internal parts between motors is allowed. Crank, pistons, rods, bolts (even head bolts, meaning no head studs allowed), balancer, cam, heads, valves, valve springs, etc. must all be stock parts. head studs should be allowed
Weight reduction is allowed, but all exterior body panels and glass must remain intact (if your truck was ordered with a box delete or as a cab and chassis, you must have a flat bed on it). Also, all factory safety equipment must still be installed (including front bumper) and working, and the HVAC system (the parts behind the dash and under the hood) must remain fully intact. The frame must remain complete and unaltered (welding brackets to the frame is allowed, but no cutting is allowed). should be a minimum weight & AC delete allowed
Fuel cells and battery relocation is allowed. stock tank & forward of the firewall
No restrictions on interior modifications as long as it doesn't break any other rules. should be limited to seats and/or consoles
Aftermarket air intakes, intercooler, and intercooler tubes is allowed. not crazy about the aftermarket intercoolers but not really a power adder
Aftermarket manifolds, up pipes, and EGR deletes are allowed. Aftermarket exhaust is also allowed.no hoodstacks or any other exhaust exiting forward of the cab