8.25 or 8.75 rear

Honestly, I'd go with the 8-3/4" if I was you.

I spent about $1,000 on my rear end. I bought an 8-1/4" rear, had richmond 3.55 gears installed with an Auburn Gear cone-style limited slip differential. It will definitely hold up to 450-500 HP if I don't lunch it with slicks, but I think new axles are in my near future. Unless I convert to an 8-3/4" rear...

I also started working on the rear disc brake conversion based on the Jeep parts. It was close to fitting for cheap, but I couldn't fit the parts under my 14" wheels. I think I have the caliper mounting brackets if you want them. All cleaned up and painted. They will fit both the 8-1/4" and 8-3/4" rear. I will have to check the shop.

-Mike