100% your track rules with the mandatory requirements listed below.
 
1.  Shop engines must run unmodified Holley 4412 Carb
2. Crate engines may run 4-barrel carburetor, no super bowl carburetors. GAS ONLY. CRUSA engine rules apply
(XP carb is allowed)
3. Max of 1” carb spacer
4. Only 8” wheels
5. No spoilers
6. No direct drive transmission
7. No roller cam shafts
8. Only dual plane intakes (cast or aluminum)
9. Only stock rocker arms
10. Only stock production heads
11. Only stock firing order
12. No motor set back
13. Only OEM ignition system 
14. Shocks must be in stock location
15. Hoosier H500 only
16. Grooving and siping allowed
17. Shock extensions ok.