I've done it on my 8 3/4. The fifth hole needs drilled, easy. I used the green bearings and I machined a step in the bracket so that the snap ring would sit in the bracket exactly the same distance of the old drum backing plate. The only thing that I didn't consider was the thickness of the rotor which was thicker than the drum, so.....the whole rearend is a little wider like 1/4 total so an 1/8 wider on both sides. Hope this makes since.