Usable power for the street?

From a dumb young guy in this wacky mopar world... build a 360 with intake, headers and exhaust... you will have a blast... but you'll soon want more and more... and more. I'm on a mild 340 build right now, mopar magazine did the same exact build had it at like 400hp. It lasted almost 2 years. Now doing more to it for some more power...