OKay I found a nice 355 for sale and I am looking into building a nice 383 for my cutty, what steps would i need to take in order to convert a 355 into a 383? I also found a vortec 350 with rod knock out of a 96 chevy for dirt cheap, less than 200, would you recommend starting with the ceap 350 or buying the 355 for 3x's as much?