Rubuta ci gaba ga wannan sakin layi - motocin Brabham sun yi gasa a Indianapolis 500 daga tsakiyar shekarun 1960 zuwa farkon shekarun 1970. Bayan wani aikin da aka yi a 1962, MRD ya ba da umurni a 1964 don gina IndyCar chassis da aka yi amfani da shi ta hanyar injiniyar Offenhauser na Amurka. Sakamakon BT12 chassis ya yi tsere da Jack Brabham a matsayin "Zink-Urschel Trackburner" a taron 1964
kuma ya yi ritaya da matsalar tankin mai. An sake shigar da motar a cikin 1966, yana ɗaukar matsayi na uku ga Jim McElreath. Daga 1968 zuwa 1970, Brabham ya koma Indianapolis, da farko tare da sigar lita 4.2 na Repco V8 da ƙungiyar ta yi amfani da ita a Formula One <unk> wanda Peter Revson ya gama na biyar a 1969 <unk> kafin ya koma injin Offenhauser don 1970. Haɗin Brabham-Offenhauser ya sake shiga cikin 1971 ta J.C. Agajanian, ya gama na biyar a hannun Bill Vukovich II. Kodayake babu motar Brabham da ta taɓa cin nasara a Indianapolis, McElreath ya lashe tsere huɗu na United States Automobile Club (USAC) a cikin 1965 da 1966 a cikin BT12. "Dean Van Lines Special" wanda Mario Andretti ya lashe gasar zakarun kasa ta 1965 USAC ya kasance kwafin kai tsaye na wannan motar, wanda aka yi tare da izinin Brabham daga shugaban ma'aikatan Andretti Clint Brawner. Revson ya ɗauki nasarar tseren USAC na ƙarshe na Brabham a cikin BT25 a cikin 1969, ta amfani da injin Repco.