Duster 1970-1972 and 1973+ Door Difference?

Interior top & bottom of the 70 - 72 doors were metal and part of the door structure - with the fibreboard/vinyl panel in between. The '73 up variety used a plastic top section and the board/vinyl part went right to the bottom of the door. (Much larger than the earlier version.)

The interior door latch mechanism is completely different in design and location. There have never been vent windows on any Demon/Duster/Dart Sport.

I have also been told that the location of the hinges & door striker are different between the two styles of door, but I've not been able to confirm the accuracy of that.