1973-74 B-body vs 1973-76 A-body spindle

Upper arms from a BBody definitely will NOT work on an Abody… the 73 and up BBody upper arms wont work on a 72 and down BBody either.

The spindles however will work for all A and B bodies (Abodies will require the 73-76 upper control arms for the spindles to work on 72 and prior Abodies)