4rcFed: on my 50 1/2 ton I used a 73 Camaro posi rear end w 3.73 gears; found some 90ish S-10 rear springs and used S-10 rear hangers too. Fabbed the front mounts myself; relocated the shock mounts. I'd suggest at this point, as viewed from the side, that now is the time to consider locating the centerline of your axles to your satisfaction in the middle of the rear fender openings. Seems the factory 116" wheelbase had the original axle a few inches too far forward. Good luck. Dave
