We are all on a budget. I know more of 350`s but an engine is an engine. All your BIG power comes from your cam and cylinder heads. Heads will cost you $1000. I believe you could get 50 ponies from a decent cam and exhaust. Keep your duration between 220-235, that`s a nice street cam. But you got to do the work yourself to save money, cams are only $100 bucks or so.