A 1969 Camaro RS/SS Z11 convertible was used as the pace car for the 20th annual Rex Mays Classic. This was a 150 mile USAC Champ Car (Indycar) event held at State Fair Park Speedway (currently known as the Milwaukee Mile) in West Allis, Wisconsin on Sunday, June 8, 1969. This was the fourth event of the USAC National Championship Trail and the one following the Indianapolis 500. Art Pollard got his first win in his teammates Gerhardt Offenhauser. Ten cars were eliminated on an opening lap accident, including Pollards'. The STP team pulled his teammate, Greg Weld, out of his undamaged car and Pollard took it to the win. The Camaro appears in a picture of the cleanup of the accident on the cover of the June 13, 1969 edition of the USAC News. It is parked amongst the wrecked race cars and safety equipment.
The event was named for Rex Mays who was a two-time AAA race champion killed in a race in 1949. It was known as the Rex Mays Classic for many years.
Photos:
1 & 2) Mario Andretti and pace car:
https://www.facebook.com/TheFinalInspection/photos3 & 4) Cover of the edition of USAC News worthpoint.com