From what I've seen, the quarter window vertical weatherstrip is reasonably common between makes and brands. Most are configured the same, just a different total length. The lower attachment is pretty common, too. Trim at the top with a sharp blade. Longer is better than short.
It just slides in the channel, bottom to top, to install. Using some water with a drop of soap helps things along. Per the normal Chrysler part numbering system, these part numbers appear to have been first used in the 1967 model year.
From the 1968 Chrysler Parts Book - - -
PN 2782560 and 2782561
Group 23-63-104 Weatherstrip, Quarter Window Glass Front Frame
ALSO FITS --- Valiant/Barracuda/Dart 2-dr hardtop & conv. Belvedere/Coronet Convertible
The fact it also fits A & B body cars can be a plus!
Enjoy!
CBODY67