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!!