Whakaotihia te rerenga e whai ake nei: I whakataetae tuatahi a Allison i te USAC Championship Car Series i te tau 1970. Te taraiwa i te No. 83 Greer Eagle 67-Offenhauser mo Ansted-Thompson Racing i te
1970 Indianapolis 500, i mutu ia i te tuawha, a, i riro i a ia te 1970 Indianapolis 500 Rookie o te Tau Tohu. I mutu ia i te 20 o nga tohu, engari na te mea kei te whakamahi ia i te raihana NASCAR, kaore ia e ahei ki nga tohu. Mo te tau 1971 i eke a Allison i te No. 84 Purolator Filters Coyote-Ford V8, ka mutu i te 6 i te Indianapolis 500. I whakataetae hoki ia i te Rex Mays 150 i Milwaukee State Fairgrounds Speedway, te Schaefer 500 i Pocono International Raceway, me te California 500 i Ontario Motor Speedway, ka reti mai i nga mea e rua. Kua kore anō a Allison e āhei ki te whiwhi tohu.