Tibernot, did you ever get your answer?
I too am looking for fenders and am concerned on the "crispness" of the Ford Tooling as well how delicate they may be due to either the metal being thinner or or just weaker compared to the metal being stamped in the late sixties. I've called around and have been "given" opinions from different vendors. Take Dynacorn for example, I know they do not make their own fenders, they buy them from someone else (I think Apex) and re-brand it as theirs, so the resellers/vendors like to say they are cheap and poor quality. My view is, a Ford Tooling fenders cost about 2.5x more, but may be thinner and easier to crease when doing any engine maintenance or leaning on the fender. If Dynacorn's fender are thicker, and you are able to get it to fit, wouldn't that be better?
But again this is all "hear say". I don't have any hard proof one way or the other. The shop I've been dealing with suggested I say away from Ford Tooling and go Dynacorn, Apex, or Golden Legion to get the thicker metal and pay the difference to the body guy to get the fit right. Keep in mind, the shop makes no money off of this suggestion, as I would be buying them from the internet, and shipping to another shop where the car is waiting for paint. It more of an observation from the cars they have been working on.
So as Tibernot asked, "Pour on your thoughts."