Befor you get started you might want to measure the frame width. It might not fit at all and you go through a lot of trouble just to be at ground zero.
all the bolt on parts from a 4.3 6 cyclender are interchangable with the small block. These are usualy in the 4x4 s10 blazers, 4x4 s10 and sonomas. some of the full size chevys with the 6 cyclenders are compatable also.