the guy I got the car from had an 8.5 5 lug reared from a 68 chevy for 100 bucks I should of taken but I did not have my truck to haul it home. I would do it the same as my 72 and change housing ends to big ford ends so I would not use gm c clips anymore. That is cheap I paid 90 at chassis shop for new ends to be welded on and tubes completely welded to center section. For less then a 1000 bucks I had 35 spline moser axles, full spool, gears, 1350 pinion yoke, big ford ends, girdle, all welding and rear setup. There is a turbo nova with 2 seasons going 8.20s @ 177 with a bunch of passes on identical setup. So some stuff would need welded but it's cheap and not a big deal