ONTARIO, CA - MARCH 28: The Ontario Motor Speedway hosted the Questor Grand Prix in which Formula One cars competed with Formula A cars on March 28, 1971 in Ontario, California. (Photo by Alvis Upitis/Getty Images)
ONTARIO, CA - MARCH 28: The Ontario Motor Speedway hosted the Questor Grand Prix in which Formula One cars competed with Formula A cars on March 28, 1971 in Ontario, California. (Photo by Alvis Upitis/Getty Images)