[TimG]

The build sheets do not always indicate the actual tire that came on a car. I have a build sheet for a '67 Corvette with redline tires on it, the car did not arrive with these tires on it as per the window sticker. The final list of actual options is reflected on the window sticker.
My '69 Pace Car that I bought from the original owner came with Wide Tread tires. The dealer/owner tried to get the factory to put Polyglas tires on the car and they would not as per my conversation with him. When I bought the car from him in 1981 I asked why the spare and the tires on the car were different and he told me that he took the crapy original tires off the car immediately and put on the good Polyglas tires. The actual tires on '69 Pace Cars have "Speedway Special" or something like this on the back side.