[John Brown]

Looks awful original to me. Does yours have a full 90 degree bend on the vent tube also? Sure looks like it. That extention ring looks about right too. If you look closely and use a magnifying glass, you may find a tiny DEMCO stamp surounded by an oval on the ring if the paint isn't too heavy. Demco is the company that supplied them to Chevrolet. Not all of them have that stamp so don't sweat it if yours doesn't have it. Also the original flat ring that held the rubber seal used on 69 Camaros was slightly oval shaped and did not have a flat side like the later one used on 70 and up Chevelles.