74 Dart door glass and rear quarter glass on a 71Dart

‘74 glass will not work with the ‘71 window track etc. The entire lifting mechanism changed in ‘74. ‘73 was one year only for the glass, no vent window but the older style lift mechanism with some modifications to the hardware.

You’d probably have to change the whole lift mechanism over to the later style. But there are even some differences in the door frame to mount the vent window frame that aren’t there in the later doors.

The quarter glass I haven’t looked into. But the door glass is best kept matched to the year(s) of door it came in. The internal window hardware changed more frequently than the external model changes.