I just done it, I've done it in the past, and I'm about to do it again. This is my most recent one..... I made a video. In this video, I replaced the 8.25. Replacing a 7.25 rear end, you'll need backing plates (alot of 8.75 rear ends come with backing plates), U-bolts, and a shorter drive shaft. You can re-drill your shock mounts, or get 8.25/8.75 shock mounts. '65-67 are the best years because they are a little more narrower than the '68-70's.
