So............my rear passenger glass came unglued or unhinged from the rail. WTF?
There's nothing holding the glass! It's just sitting there held in place by a rubber long bushing of some sort.
I took my panel, etc. off only to find that there's an opera hole where by we can work on the glass, rail, etc. I applied silicone sealant/adhesive in hopes that the window will seal better and stay.

__________________

1976 280C
SLOWER DRIVERS KEEP TO THE RIGHT.
DRIVE RIGHT PASS LEFT