AALL 73 and lates A bodies got big bolt pattern
Nope
About rear axle. You can take any A body 8.75 rear end and get couple of any other body axle ( but A body ), remove the axle hubs from them and reinstall them on the A body axles from the full assembly rear end you got. I think that's way easier than mod a full rear end dimmensions.
There are zero other body axleshafts with the 4.5" bolt pattern that will swap in without mods and you cannot remove the axle hubs, it's a one piece axle.
This job has being done here with success even on 1/4 miles cars.
Not thinking this is true either.
