8 3/4" rear question

Sorry folks, I forgot to say a "B" body 8 3/4" rear in an "A" body. Finding an "A" body rear is difficult & usually pretty costly, they are prized by many "A" body people. The "B" body rear is a better fit (and much easier to find) in a Duster, Demon, Dart Sport, because they have the slightly bulged rear fenders. I know you've seen them from the back. The front track is much wider than the rear track, by 2" or so in some cases. Not looking for originality just a proper look.