 Thompson and his sponsors, Harvey Aluminium and Jim Kimberly (of Kimberly Clark), asked Crosthwaite to design a car to race in the 1962 Indianapolis 500.Unusually they used a stock V8 Buick engine and it was in the rear unlike the front-engined, race tuned, Offenhauser powered cars used by most competitors.It was the first stock engine to be raced at Indy since 1946 and was the beginning of the rear engine transformation at the Indianapolis 500.