[jannes_z-28]

You should know that the X-codes really didn't have anything to do with the engines or options on the car. It was a designation on how the body should be painted or what trim it should have. X33 and X77 were Z/28 and required stripes. X22 and X66 were 396 and they had a black rear panel. X11 and X44 didn't have any special paintings to the body. X55 were 350 SS without style trim but with the rear fender moldings.

Jan