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

SGBARRACUDA said
A B-body 8 3/4 with A body 43" width perches running 10" rims with 7" BS. Something doesn't sound right.

you are totally right. I do have a spring relocation. The car is not tubbed however. That's deff essentially info that I forgot!