Rich you might be right,I thought all AD's were the same.But a stovebolter just sold me a drivers side defroster outlet that is diecast metal, not like the the stamped sheet metal one I have for the passanger side.He said he thought it was out of a 50' Chevy. It fits my dash perfectly and is a better quality piece than the one I had in the GMC. New port is sending me some directions.
