Noticed something odd tonight when we were polishing the stainless pieces that the top of the door panel slides into. The passenger side and both rear pieces were 3/8" wide and were ribbed on both sides with a 1/4" or so flat area between the ribs. The drivers side had a 1/2" wide piece that is kind of V grooved in the center. I know the door was replaced at one time cause it was originally green not purple like the rest of the car. Anybody know what this piece is? The car had a deluxe interior so Im guessing this piece is used on the standard 67 interior or is possibly a 68 item. Thanks.