Since your truck is a 47 second series there is room for a big block. As far as stance is concerned you can set the frame at the desired height and then figure out how to put suspension that will work on it. Probably bags or coil overs are the main options. Any way you go is going to take MAJOR fabrication skill and the tools to do so. Flaming River and IDIDIT offer "shorty" steering columns where the steering shaft can be offset to clear engine. With even a stock BB the entire chassis/brakes/steering need major attention. Good luck.

Evan