ive had 2 V8 vegas in my days both backhalved. they make kits for the whole deal. crossmembers, backhalf sections, or full tube, if you go backhalf you will need to purchase a special oil pan for cross member clearance. and also fenderwell headers, hooker makes a nice fitting kit, the stuff is high priced but then again what isnt these days. also it needs a manual steering box for what you want. to build one from that state is a long haul, but i always loved those little vegas.