EXHAUST:Stock unaltered cast iron exhaust manifolds only no porting or grinding allowed. No welding exhaust pipe to manifolds or modifying OEM exhaust flanges. NoChevy center dump, Corvette, marine, Lt1 or tubular steel type manifolds. No adaptors between head and manifold must be able to use ...
Any intake- no porting or polishing. Stud mount rockers only. No stud girdles. Stock diameter valve springs only- 1.250” Maximum O.D. (Beehive Spring Allowed 1.310” maximum O.D) No double valve springs. Any manufacturer (Chevy,Ford,or Dodge). Any Steel, nonported/polished cylinder head....