My 94 z28 has been used for me to daily drive from work and back all highway miles rarley did i beat on it. But now i got anther car and was thinking or rebuilding or supercharging it. Its go almost 128K on it but runs great doesn't burn anything. Heads and cam would require a full rebuild and i don't know if i'm up for that right now(got a 90 mustang drag in progress) and supercharing just seems easy for big power gains. What should i do???

 

Heads/cam would be the more reliable route as long as you don't rev the holy hell out of it. A supercharger will pretty much assure you will rebuilt it sometime in the future.

 

yeah i'd probably go with the heads and cam

N/A is best!

 

which will yield a better quarter mile time i've heard good things about both?

 

I wouldn't exactly say that.

Performance is kinda subjective. If you're close to sea level, then both will have a similar effect. If you're at a higher altitude, then the blower will perform better because it will pack the cylinders more efficiently.