if you open the hood you can see a gap between the fiberglass (above the head lights) and the metal cross beam and it almost looks like the two were attached but I have no idea, I do know if you push down on it then the headlights will go up without rubbing or getting hung up and the hood lines up correctly. I know on the bumper vettes, 68-72 (73) you could somtimes see the tops of the rivets, sort of like bumps in the paint in front of the hood. Like I said, I dont know its gotten me stumped.