Cika wannan jumla:
1967: Andy Granatelli da 'yan'uwansa sun kawo wata sabuwar motar turbin da aka yi amfani da ita zuwa Speedway a wannan shekara. Parnelli Jones ya mamaye filin gaba daya a ciki, kuma yana jagorantar kusan zagaye daya lokacin da abin hawa a cikin gearbox ya kasa tare da zagaye uku da rabi kawai. A. J. Foyt ya yi nasarar tsallake hadarin mota da yawa a kan madaidaiciya ta ƙarshe don cin nasarar '500' na uku. Gasar ta kasance al'amari na kwana biyu a karon farko lokacin da ruwan sama ya jinkirta taron bayan kawai zagaye 18 a ranar 30 ga Mayu. Ba da daɗewa ba bayan tseren, jami'an USAC sun canza ƙa'idodin da suka shafi turbines don rage fa'idar Granatellis.