Weird axle housing width.
Might look at e body axles. would probably have to trim about 3/8 off each but would probably leave enough spline.(barely). being even longer than b body rearends will make it tighter wheel/tire clearance for an a body. I have narrowed lots of b,c,e body housings to fit better in the a bodies.I like to narrow them so that the 4.5 bolt pattern axles end in the same place as stock. I have narrowed many different lengths for a bodies for all kinds of wheel/tire combos. same price as stock length.paul