[JoeC]

The numbers in the upper right and the "8" in the lower left of the trim tag, I have seen on other Chevelles besides COPOs. I have seen numbers in the upper right that looked like they were stamped on the trim tag after it was installed on the cowl.
Rob's Yenko Chevelle has an "S" for Midnight Green vinyl top. This is the only Grn top I have seen on a Yenko Chevelle. There does not seem to be as big of a data base of trim tag numbers collected for the Chevelle as for Camaros and Corvettes. I am not sure what the "8" is for. It had to be for something where the operation had to be done during Fisher body assembly before it went to the main assembly line.