90 % of the used hinges being sold are worn out, the rivets are almost always worn out.
I have had over 20 sets of 62 hinges and a 1/2 dozen 61 hinges, all but one set had bad rivets.
Some of these sets were damaged in addition to having bad rivets.
Rivets that move in vise in their hinge points mean that the hinges will not hold up the hood and/or the hood will not adjust correctly.
I have been replacing all the rivets ( and bad sections on used hinges) and then zinc plating in gold color( like the originals) a group of my 1961 & 1962 hinges, including restoring the hinge springs( bead blasted open and repainting them black.
Paul