Found this 67 fastback decklid stashed in the back of a van, not down by the river, but in a junkyard.
I noticed that there was a J-nut installed on the hinge in a location that would appear to limit the opening of the lid. See the second picture, highlighted in red.
No evidence of respray - nut has original color paint on it.
Hardly a common place to get a picture when installed on a vehicle. There's probably only one person I'm aware of that would get a shot of this area. You know who you are lol.
Probably a Dearborn car due to the Michigan location, but that is of course no guarantee.