i'm now at a point that my tri y 1.7/8 headers will hold me back top end. & then my carb & inlet manifold cam & oil system is the next step after that. well it seems that for the same money as a good custom set of headers & 3-3 1/2" exhaust , i can get my self a borg warner 75 mm turbo, c&s e85 blow through carb & log type exhaust out to duel pipes from xpipe back. i'm thinking a set of rods, the pistons i have, cam & head gaskets & coverter & i'll be maxing out my drive line & i'll call it quits there.