The hoods were painted at the factory, and then they cut the hoods for the hood locks with hole saws and jigs. Obviously, they weren't too concerned about potential rust.
I've NEVER heard of a car without hood locks from the factory. I wonder where Marti gets this kind of info???
I have heard that special days of the week were designated to assemble the GT/CS (HCS) at the San Jose plant. The workers really didn't like doing them, because the Mustangs and Cougars were already too option-heavy, and too many variations in assembly.
Paul.