I thought it was an A body rear end?

klrfish1968 said
Some food for thought.... They never built any A-body rearends with the big bolt circle. If you've got one with the big pattern then it was either modified, (aftermarket axles or redrilled flanges) or it's not out of an A-body.

You must be speaking of just the 8.75, because the 73+ 8.25's were BBP.