'71 vs. '74 Dart rear seats

Is the rear seat (top and bottom) from a 1974 Dart the same as the 1971 Dart Swinger rear seat? If not the exact same, will the '74 seat "fit" in a '71 without modifications? Thanks for the help.

I Think the two door to four door rear seat bottom is different

67-76 2-door hardtop rear seats interchange, 4-door and 2-door sedan would work in each other but not in a 2-door hardtop.