I believe what Norm got was a piece of division rubber with a cross section shaped like an H Very generic in its application and NOT molded to the entire window seal. As for the division bar in itself, the Dodge is longer, curved on each end ad designed as the finisher for the window molding. The Plymouth glass is not as tall, the division post barely connect to the window molding threfore the need for the center connneting stips top and bottom. Further. I don't think I am out on a limb here, but assume Norm had to drill his mounting holes for the division bar and backer plate.