Well, now that you can take those numbers and the measurements from flange to flange, and pretty much know what car your rear came from. Then you can go to any auto parts store and ask for whatever parts you need to complete the package. Looks like you are going to need wheel cylinders, a hardware kit for each wheel, the star adjuster mechanism that goes at the bottom (this might be a toughy as most auto stores don't carry these......maybe NAPA might) shoes, and drums.

You actually scored a pretty good rear end setup, and the posi is a plus. I'm not normally a fan of posi in a short wheelbase, light car because it tends to sometimes want to make the car go straight on turns, but you will be able to determine that when you start driving it. Some do, some don't. But the 8 3/4 is certainly strong and good looking. The only other problem you might have is that the snout on the rear is pretty long and T buckets have a short driveshaft even with an 8 inch or 9 inch rear, so you will have to see how that works out.

Good luck,

Don