Nyorai kupfuurira kweiyi ndima - Kirasi yemotokari yemotokari yakatanga sechikamu cheAAA Contest Board. AAA yakasarudza kurega kubvumidza makirasi ose emijaho pashure porufu rwaBill Vukovich pa1955 Indianapolis 500
yakateverwa zvikuru nenjodzi yeLe Mans ya1955. USAC yakatora chirango mumakirasi avo ose kutanga muna 1956.