Mezue ahịrịokwu na-esonụ: Na Machị 1, 1964, United States Road Racing Championship (USRRC) mere ihe omume abụọ dị kilomita 150 n'okporo ụzọ. Dave MacDonald meriri n'ọsọ nke mbụ n'ụgbọala King Cobra, Jim Hall bụ onye nke abụọ n'ụgbọala Chaparral 2A na Bob Holbert bụ onye nke atọ n'ụgbọala King Cobra ọzọ. Ken Miles na Dave MacDonald mechara 1<unk>2 na Cobra Roadsters n'ọsọ ehihie. Dave ga-atụfu ndụ ya izu ole na ole mgbe e mesịrị na
Indy 500.