If you talking about the molding that runs along the doors quarter and fender, good luck. I had the same issue. My 70 Dart has holes where those clips go, some models had studs some were double sided tape.
What I did was grabbed some vinyl top trim clips with threaded studs. The clips slide right into the trim and I just threaded a lock nut from the inside. Some of them were hard to get to buy I got it.
These are the clips, bought a box from auveco.
https://www.napaonline.com/en/p/BK_...Pg-KgLP-m2LiIjx_cRoCmYQQAvD_BwE&gclsrc=aw.ds&
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