In 1965, the USRRC (United States Road Racing Championship) brought their version of the "Vanderbilt Cup Race" to the Bridgehampton Race Circuit. As described in the offical program, the format for the race was 75 laps (213 miles) for "Appendix C and SCCA modified category cars and F.I.A. Appendix J Grand Touring Cars". The big attractions for the race were the two Chaparral entries, considered the fastest and most innovative racers of their era.
The Chaparrals, driving by Jim Hall and Hap Sharp, did not disappoint finishing first and second.