The 72 challenger could have either the 5 bow or the 4 bow as sometime during the 72 year is when they switched from 5 to 4. The 73-74's all had 4. As for the bow clips, I've installed the headliners in both of my 73's and there are no bow clips, although there are clips that hold the headliner to the roof frame where the window weatherstrip sits. Don't have a pic handy but if you need one I can get one.