8.75 help!!!!

A-bodies IIRC are speced at around 52/52.5
EDIT: a lil research showed up 52.625
That would make your new axles 1.0 + .25= 1.25 inches too short.....

Your spec is for a 65 to 67 B-body, which is a common swap, altho it can be tricky to mount wide wheels.