For stock or DD, heres my couple pennies:
Stock axle housings (but stuff whatever you want inside them)
Factory wheelbase
Factory "type" suspension (if it came with leafs, coils, IFS, it's got to have em)
Full length and width body (Trimming allowed ONLY for tire clearance)
35" Tall tire limit, DOT, no stickies, no aftermarket grooving or siping
All factory
glass in place(if so equipped), windshield mandatory
All steel body, unless supplied otherwise from factory, with all in place (hood, tailgate, doors, floors, firewall,ect)
No beadlock wheels. If you pack a spare on the vehicle you can use it
Stock Headlights, tailights, ect in factory locations and working at tech (but they could pop em out after)
Winch optional, but rope required, limited to one winch front or rear
Current registration and (where applicable) safety inspection required
And, of course all the basic safety items.......
Oh hell, did I just list the original rules from back when it was fun???
I think this class would rule!!!