What doors are the same between A bodies?
Are the 70-72 Dart Doors the same as the 71-72 Demon.
Or are the Duster doors the same as the Demon?
Are they all the same, just some use the vent window while others don't?
The dart door glass is straight where the dart sport/duster has curved glass, Maybe a 73 dart door with out the vent window would be closer,but you would have to change the door glass, an put the curved glass track in. Fiberglass doors should fit.... it's all in the glass
Thats true in pre 73 doors, But the inner door latch in the 73 door is in a better position if you have a roll bar or cage in the car. It ends up a little higher and a little forward up out of the side bars and armrests way. I wouldn't use fiberglass doors without a roll bar or cage any way. So it depends on how stock you want your car.