1-dii Maarso, 1964, United States Road Racing Championship (USRRC) waxay qabatay laba tartan oo 150 mayl ah oo ku saabsan wadada wadada. Dave MacDonald ayaa ku guuleystay tartankii ugu horreeyay ee King Cobra, Jim Hall ayaa ahaa kii labaad ee Chaparral 2A iyo Bob Holbert ayaa ahaa kii saddexaad ee King Cobra kale. Ken Miles iyo Dave MacDonald waxay dhammeeyeen 1<unk>2 ee Cobra Roadsters ee tartanka galabta. Dave waxa uu lumiyay noloshiisa dhowr usbuuc kadib tartankii Indy 500
Waxaad