COPOs/Yenkos are trimmed no differently than any other '69 Camaro. X11, X44, X66 resulted in the same trim level as any other. I do not believe there were any X11s in the first Yenko group. Very few X11 Yenkos.
It is a coincidence that there is an X11 Yenko under my guidance. Perhaps the most unique, it is an automatic with a factory console, special interior group, style trim, VE3 bumper, power steering, vinyl roof. It is Daytona yellow, only the rockers are black. Really sharp car!