Ku sii wad qodobkan - Allison waxay markii ugu horaysay ku tartantay tartanka USAC Championship Car Series sanadkii 1970. Wadista No. 83 Greer Eagle 67-Offenhauser ee Ansted-Thompson Racing ee 1970 Indianapolis 500
, wuxuu dhammeeyay kaalinta 4aad wuxuuna ku guuleystay abaalmarinta Rookie of the Year ee Indianapolis 500. wuxuu dhameystiri lahaa kaalinta 20-aad ee dhibcaha, laakiin maadaama uu isticmaalayay liisanka NASCAR, ma uusan u qalmin dhibcaha. Sanadkii 1971 Allison wuxuu waday No. 84 Purolator Filters Coyote-Ford V8, isagoo ku dhammeeyay kaalinta 6aad Indianapolis 500. Wuxuu sidoo kale ku tartamay Rex Mays 150 ee Milwaukee State Fairgrounds Speedway, Schaefer 500 oo ku taal Pocono International Raceway, iyo California 500 oo ku taal Ontario Motor Speedway, isagoo ka fariistay labadaba. Allison mar kale ma aysan helin dhibcaha.