Will 8-3/4 alxes fit in the old 65 7-1/4 rear?

Hey guys: I just happen to have one ( 8.25 ) and am waiting for the backing plates to arrive before i complete the assembly. It is a suregrip, gear unknown till tomorrow but will sell and ship if someone wants it. Make an offer. I'd like to get on the north side of $500 for it. I'm in West Plains, Mo. 65775
Small Block