Whats is worth 8 3/4 with suregrip, drum to drum, 3.91's

I have a 8 3/4 in my running driving car. It has A body width perches, a suregrip, 3.91's in a 742 case.big bolt pattern. and I think the larger drum brakes.

Only thing I can think to mention is that I think its B body width. I currently run 10 inch wide wheels, and they fit just fine with it. in a scamp. I can measure backing plate to backing plate when it warms up.

I would be selling drum to drum.

appreciate any thoughts. thanks!!
it ain't going to be running and driving along if you take that rear end out of it! Out of curiosity what's the new plan?