Are rear seats interchangable on all A-bodies?

missing linc said
All Dart Sports, Dusters Demons and Swingers are 2 door models. As far as I have found the upper section are all basically the same with the exception of the location of the tabs that secure them, (where the bolts go through).

You are correct, because the "package tray" is at a higher location compared to other A body cars.