Thanks Jeff. The puzzling thing on my car is that I can find no evidence of a hole in that location. I will look again tonight but based on previous inspections, there is no evidence of a hole that has since been filled.
Hmm - panel has a good date on it and that inner panel hasn't been replaced?
Now focusing on your cars specific time period to see if there was change taking place - or an odd worker that choose to attach it elsewhere I found
Attached in the same general location
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Appears to be traveling in the other direction but the example is a "restored car"
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Sorry no matches - also too early to check Boss's and Shelbys will not help much