Originally Posted by 340Cuda
Are the "1965 "K" Hemi aluminum heads" the only ones NHRA allows on 65 Stock and Super Stock cars or is there a aftermarket replacement allowed?


Go to NHRARacer.com.

It’s the location for class weights, factors and engine blueprint specs. It will tell you what part numbers are allowed for heads, manifolds, carbs, etc., amongst other things important if you race NHRA.