I have recenty purchased a 351W out of an old van. The guy said it was a stock 351W, but when I tore it down, it has been bored .060 over and has a four-bolt main. My question is, is there a way to build this engine up into the 400+ hp range without replacing the pistions, rods, and crank? And would I be able to add a nitrous system later, again without replacing any of the rolling asembly? I am kind of on a budget, so anything will help. Thanks!