i wanna do cam and heads. i plan on buying a set of bare lt1 heads get them milled. ported and polised, get bigger valves in. do springs and retainors, cc306 or gm847 cam with a matched intake manifold. and a dyno tune. can i see 425 rwhp. i have 85000 on the clock. and i am building a bottem end later on but for now i wanna freshen up my top end. what supporting mods will i need?

 

425? Not likely. Going to need a top notch port job (on stock heads), pullies, big TB,good headers (edelbrock ugh), etc. to hit 425.. Also will need a hell of a tune to go with it.

 

well i planed on going with hooker lts any ways. so what is a likly number with a stock bottem end.