[Don_Lightfoot]

Very interesting Doug and William. Must have been for COPO Camaros only and not used on COPO Chevelles. The one COPO Chevelle build sheet I have on file has "---" in box 104 (tune up label). As I mentioned earlier, survivor 69 COPO Chevelles do not have the label on the upper rad support.

It would be nice to know if Chevy altered the "CH" label for the Camaro L72's and ZL1's. The engine size was not shown on that label, but the horsepower was.

Appreciate the input. Sorry if I have redirected this thread from the original posting topic.