I found out B-Body backing plates are different than A-Body after I got a set back from a powder coater and he sent me the wrong plates back. Different width shoes as said above, the areas where the shoes ride is higher on A-Body plates.

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!