It is my understanding the rear disc setup from a Jeep Grand Cherokee 8-1/4 can be used on an 8-3/4 rear end. The center hole has to be hogged out a little, and a 5th mounting hole drilled (8-1/4 uses only 4 bolts, 8-3/4 uses 5). I got a set to do this swap, I just haven't done it yet. Checking the measurements on my parts, the info I got on this swap looks correct. Parking brake cables would have to be figured out as they are different, but I don't anticipate a lot of trouble there.
