I was looking at another thread on this site and it showed this clip on the firewall of several unrestored 67 - 68's. So I went out to my two '68 Cougars, both Dearborn cars. Neither had factory AC if that matters. Anyway, they both have a plastic clip approximately where this metal clip is shown in those photos. Is it a non - Dearborn thing, or was it triggered by something else?
The clip in the photos came from my old spare hardware stash. Stuff that mostly came from junk yards back in the 1980's. I made a habit of collecting stuff that I didn't think would ever be reproduced.