actually roof itself is the same between Plymouth and Dodges on those years ( 71/74 2 doors B bodies ) since the quarter window opening shape is not on roof, its on quarter panel

however the CHARGER glass, its diff between 71/72 and 73/74 ( as stated not saying won't fit somehow )... 71/72 Plymouth, yes is the same than 73/74 Charger, so does the opening shape