personally i think you should have stuck with dbw, its so easy to install. But since you are going cable you will need to acquire whatever pigtails you will need for the throttle body and then get a wiring diagram and hack up your tb harness. as far as your fuse box, it may just plug right in but i think there were differences in fuse locations between models and years. As in your fuel pump fuse may be powering something else. I would call gm and get part numbers for your fuse block and the truck the engine came from and see if they match.
1993 GMC Yukon GT, 6.0 vortec, head work, no cats, cai, HpTuned by me, jasper lvl2 4l65e, nbs brake conversion