I have used many a set of used hinges without issue with hood fitment on ADs. They weren't horribly ragged, but they did have some wear in the rivets. Poor hood fitment of ADs is almost always due to things other than the hinges.
The instructions in the Truck Shop Manual actually refers to how the spring support assembly adjustment procedure actually accounts for the slack in the hinge rivets.
Now if you want to discuss the hinges in '55.2 through '59, and '67 through '72 hood hinges, I cannot help you. I don't think those hoods are supposed to close right.

Carl