A slightly off-topic, but related question...
Did the '67 San Jose cars use these rubber tips as well?
I don't recall seeing any when I disassembled my car...
Yours would not have had them.
But some very late 67's had them. Don't have a solid change over date and few examples as not many people take pictures of the back side of the taillight panel it seems. And unfortunately the lack of them after 50 years doesn't always prove that they didn't have them so we're left to wonder
Here is a picture from 7F01C227419 (approx July built @ Dearborn) as an example
Splitting off as a separate 67 discussion and will relabel the original as a 68 thread