COPO ZL1 with the yenko performance pakage.

[Tracy]

Did any of the original 69 COPO ZL1 camaros get a yenko performance upgrade. I know the traditional yenko cars were cast iron block with 201 or 198 of them produced. I can find all about this on the internet. But wasn't there five yenko versions of the COPO ZL1 camaros made? I hear of five ultra rare COPO Yenko ZL1'S. pardon my ignorance if I don't see this correctly but this is an unanswered question that I cannot find the answer to. I want my information straight if I happen to find a miracle barn find.