The fender tag tells a good story, but I have never seen one quite like it. Serial # 8, July 28th 68 production date. No real options shown on the tag other than colors.I’m sure someone like @Jerry Hall would know better, but I believe to my understanding that they were test cars.
My understanding is a Pilot car, was a test mule, sometimes used for test cars and to make the assembly line process more efficient. Any other thoughts are welcome.