There are differences in some of the internal structure pieces as 71 took headliner rods. Also the A-Pillar interior trim changed in 74 so good chance those pillar structures would be different
Thanks a bunch! I would guess the A-pillar trim changed because of the deletion of the vent windows in the doors? I checked the front/rear glass and they're identical. Researching these A-Bodies, surprisingly there is a lot of stuff in the Dart line up that interchange 1967-1976.