Here are a few close up photos of the door decal used on the 1969 Camaro RS/SS Z11 convertible pace car. I cropped them from photos of the car being used at another event held at the track. A thread of this event will be posted in the future.
It looks like they took the "OFFICIAL PACE CAR" section of the original Z11 decal and moved it lower on the door and then added the red logo of the track above it. Compare it to a vintage bumper sticker from the track (worthpoint).