Here are images of the souvenir program, brochure, ticket and patch from the event. These all came from worthpoint.com
It's likely, but I haven't been able to find any photographic evidence yet showing that the 1968 Camaro RS/SS 396 convertible was also used as the pace car for the 2nd Annual Paul Revere 250 NASCAR event for Grand Touring cars held at the track on July 3, 1969.