Does anybody know if the hard molding parts such as sail panels are interchangeable between all the years and between dusters and dart sports
The only thing I can think of is the fold down rear seat models could be different from the standard rear seat models.
'73+ Duster & Dart Sport will interchange. (Not sure about the fold-down seat versions. '72 & earlier Dusters & Demons had metal sail panels and probably some other trim differences.
I can't say for sure. There was a mention somewhere that one way or the other is possible, but requires some mods and may not look perfect. I never looked into it.