Back Seat Interchange

They all look the same to me. Don't know what they could of changed to make them not fit. The first pic is of my 70 Dart the other is a 75 Duster. I am going to try and switch the seats in these two cars when I get home tonight and see what happens. I think they will fit.

70 and 75 may interchange and still not fit a 68. A tape measure can save a lot of labor.
The rear benches in 67 cuda and 73 4 door Valiant look close enough too at first glance.