Early Dart Headliner Install Question

Just installed a new headliner in my 1965 Dart 2 dr. I didn't have such "drive nail". I don't recall the listing going all the way down the sail panel section, but perhaps it did. There is a seam there. I didn't use that "drive nail", and don't recall it in the FSM so perhaps began in 1966. I have two clips which look similar which were for the package tray, at least in a bag I marked thus but found after I had installed that. They have spring fingers like the door panel clips, but a round flat button top, so perhaps what that drive-nail is. My sail panel boards had fallen apart, so I cut new ones from ABS sheet. I glued thin foam to each side so the panels wouldn't slap against the body (used packaging foam bag from electronics).

I similarly made a new package-tray shelf from ABS sheet, covering it with vinyl upholstery from Joann's Fabrics and cutting holes for modern speakers. I'll do similar for the rear side-panels, covering w/ the original vinyl. The front door panels are OK but need to reattach the vinyl since it shrunk and wrinkled.
Thanks! Yeah, I'm 99.9% sure the "drive nail" figure in the FSM is a mistake. It just doesn't make sense. No harm no foul though. You'r right - that listing wire doesn't go that far down either. What's weird is that there's a spot for one though (see photo). Maybe it's because they used that same stamped inner panel for other models; who knows...

I ended up just riveting a piece of aluminum sheet to replace the factory sail panel board along with some rope caulk to ward off any potential rattles.

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