At some point in my 67 Coupe's previous life the owner put on a pair of Camaro quarters. I guess you all know I don't have the louvers behind the door any more. I was able to purchase a used pair on Ebay and now am going to get them welded in. Does any one know the measurement that the first louver would be behind the door jamb? Up and down is not an issue because of the body line.