I checked my parts books from 1967 to 1974. As already mentioned, the hardtop mouldings are different from the sedan ones. '67-'74 hardtops use one set of part numbers while '67 to '74 sedans use a different set of part numbers. By any chance are there any Dart sedans in your area that you could compare your mouldings to? That would tell you if they are hardtop or sedan ones.