It depends on what wheels you plan on running for the most part, with 15's it probably wouldn't work too well and would be better off having one cut to A body size.

I've used them under duster/dart sports and A body Cudas since the 1/4 bulges more, I'm looking for a decent B body 8.75 to put under my Dart since I'm planning on going with 17" wheels. I have an A body width rear under it right now and the wheels I want to run need a 1.5" spacer to clear the leafs, the front is fine since the track is pushed out with 73+ discs.