Hey big perm I have a 91 gmc pickup. I wanna put a 383 with a t5 trans and some big micky Thompson 15x12.5 tires under read end is there a rear end you know of that I can swap without lots and lots of changes. I'm wondering if I will need to.do my frame rails too? I no ill have to tub it. It's a short wide box.not a step side! Sure would be good if you could give me some advice..Doug at
douglasmullen@ymail.com thanks man you wouldn't happen to be in the Pacific Northwest would you bro.