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. GAS ONLY. Applies to all engine options. No E85
4. Max of 1” carb spacer
5. Only 8” wheels
6. No spoilers
7. No direct drive transmission
8. No roller cam shafts
9. Only dual plane intakes (cast or aluminum)
10. Only stock rocker arms
11. Only stock production heads
12. Only stock firing order
13. No motor set back
14. Only OEM ignition system 
15. Shocks must be in stock location
16. Hoosier H500 only
17. Grooving and siping allowed
18. Shock extensions ok.