 Marshman may be best known for his performance during the 1964 Indianapolis 500.Early in the race, following a fiery crash that claimed the lives of Eddie Sachs and Dave MacDonald, Marshman took the lead from polesitter and race favorite Jim Clark.Marshman, driving a Lotus 29-Ford, extended his lead until the 37th lap, when he was forced off the track to avoid hitting a slower car driven by Johnny White.