Kevin,
The prototype stripe car I am talking about is a white 1968 L71 with a ZL1 stripe done at GM tech center or at least that is what they claim on the web page. The story behind this car is that it was the prototype car for the ZL-1 stripe, used by GM Design in 68 before the real ZL-1 was released. The car was originally ordered by a GM employee but never titled, driven, or registered and was then sold directly from the GM Tech Center. The guy has the GM "Request for Vehicle Purchase" from the Tech Center as well as a copy of the original options sheet which has an option for "Kit ZL-1 Stripes". He also has an old picture of the car. here is the link
http://www.sharkwerkes.com/sharktank...o/68proto.html