Hi, I have a 67 RS/SS350 with tinted windows option. My question is this: How early before the cowl tag build date should my window codes be? My cowl tag is 01A, but my LOF glass dates november, october, september and august of 1966. Do you think any of it is original? Some of the glass is missing. My car also came with extra quarter windows, dated December 1966, but they are PPG glass. Was this option so rare that the tinted glass sat on the shelves for months waiting for a car to come along the assembly line that needed them? Thanks, Randy