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