I have a 70 RS/Z28 in original condition with the 3 piece spoiler, the caps do not have the revised part # and was built 04C, is that a little too early? Looked for the build sheet but it's gone forever. I was going to do some title seaching if the date is not too early, maybe get lucky and find original owner.

Check with Phil Boris on the Yenko Site, he probably knows more about these cars than anyone. He goes under "70 COPO" over there......

www.yenko.net