68 Barracuda rocker trim

I think if was gonna put that trim on my car I would use trim tape ( black adhesive on 2 sides. First I would cut and fit an aluminum back in the rim , then fill the void with great stuff expanding foam, This would provide a surface for the trim tape to mount to without having the trim become too heavy for the tape to support.
I suppose the lower gill plates would still need their painted head screws since those ware quite heavy from the git go and the screw holes are there already. Just an idea.
I may have a half dozen or so of those original clips but I would need a pic of one since I have so many different type clips in one box.