I know the first 50 Yenkos with build dates in January of 69 carried the X66 code, but did any other non-Yenko COPO's come from the factory with the X66 code or was this specific to just the first 50 Yenkos, that question has been rolling around in my head for a while and I have been watching the forums to see if that has ever been addressed but have never found anything on it, Thanks.
