Thompson's promotional skills pleased the sponsors with the publicity generated that year. For the 1963 Indianapolis 500, Crosthwaite designed the innovative Harvey Aluminium Special "roller skate car" with the then-pioneering diameter wheels with smaller-profile racing tires, wide at the front and rear. Thompson took five cars to Indianapolis - two of the previous year's design with Chevrolet V8 engines and three roller skate cars. One of the new cars, the Harvey Titanium Special, featured a lightweight titanium chassis. Al Miller raced one of the modified 1962 cars to ninth place despite only qualifying in 31st position. Duane Carter qualified one of the roller skate cars 15th, but was only placed 23rd after an engine failure on the 100th lap. The small tire sizes and low car weights caused complaints among the old hands and owners, so for future races, cars were restricted to minimum tire sizes and minimum car weights.