Are rear seats interchangable on all A-bodies?

IIRC the back rest is basically the same, except of course for the fold down models, I used seats from a 75 or 76 Special edition Dart in my 70, the only difference on the backrest that I recall was the tabs that bolt it to the transition pan were in a slightly different location, but not a big deal, The bottom cushion locks were also in a different spot, but you can move the hooks to the correct location.