Frank Lockhart Set the record for the fastest single lap driven on a board track (championship car) in a Miller 91 rear drive with an average speed of 147.229mph at the Atlantic City track. This track was the fastest and last major board track constructed.
Mike Spence, Grand Prix and Sports car driver, died when he was killed in practice in the Lotus turbine car at Indianapolis. He crashed and the front right wheel of his car struck him on the head. Later that same night, Carroll Shelby withdrew his two uncompetitive turbine cars from the Indy 500.
Bob Senneker won the ASA 150 mile race over Larry Phillips, Dick Trickle, Larry Detjens and Dave Watson at the Wisconsin State Fair Park Speedway, West Allis, WI. Pole sitter Mark Martin finished 15th and Rusty Wallace finished 18th.