Oh I shoulda added the full rules
Stock cast iron exhaust manifolds allowed. No center-dump manifolds allowed on Chevrolet. Casting numbers also not allowed are 10168496, 10168494 and 12524289. Stock replacement exhaust manifolds allowed for cast iron stock manifolds currently allowed by rules. No other after-market or reworked manifolds allowed. No headers allowed
So those Ram center-dump manifolds would be illegal. Someone told me the LT1s off 93-97 Camaro flow real nice but I don't think they fit my heads. So back to the drawing board, any other ideas?