Two questions that are similar
1) Can you use an E body brake it (Baer/Wilwood 13"-14") on 73+ Abody spindles, on an A body?

2) Could you use 70 Cuda spindles on an A body to run a Cuda disc brake kit on an A body?

I ask because Baer does not list a kit for A bodies in the 13-14" size. If the spindles are the basically the same I would think it would work, assuming you have the big ball joint A arms as well.