I found a Dana60 with floating axles out of a 77 f-250. It has a 3.54:1 ratio that I like and is only 2 inches wider with my 17" rims on it. Not noticeable under a flatdeck. I will have to move the sprind perches it a bit but the stock u bolts will work. Im not sure but I dont think Im going to need a convertion U-joint. Plus you get better brakes with easy parts avalibility.