[big gear head]

I'm sorry, but I'm not understanding why this car would be a X66. If it's a '69 Yenko then wouldn't it be a COPO? And if it's a COPO, then wouldn't it be a X44 or X11? What am I missing that would make this car a X66? Most of the people on this sight know more about these cars than I do, so I'm trying to learn from you.