N66 wheels are doucumented on other early production 1969 Camaro SS.
The "window sticker" for the COPO as described in the ad is at least a "DX" [dealer exchange] hand-typed reproduction. Dealers were able to do that in those days. Some of the re-distributed ZL-1s got one also.
If Courtesy did order it why they had to do that is a good question.