It seems like there has to be new answers to some questions or questions to old answer as to what actual thickness were the light weight A-990 fenders, doors and scooped hoods in 1965.
Gauge?
Thickness in thousands?

I ask because I have a pair of supposedly A-990 fenders that even though are flimsy and lighter on the outer skins with standard inner framing, have a questionable thickness to them in thousands. Theory is that these things were stamped at different times in the built schedule and tooling, stampings may have varied from one to the other. Absolutely no signs of chemical milling though.