Dart Windshield Interchangability

This is getting confusing. From 70 on, it is necessary to match the body type for the windshield. The Duster/Demon/Dart Sport windshields will interchange amongst themselves but not other body types. Likewise the 2 dr hard top Scamp/Swinger. Likewise the 4 door sedans will interchange. The glass has different height for each of the three body styles and, in the case of the fastbacks, the upper corners are different. Funny, the pivoting vent window glass will interchange, but not the gasketing.