Dee ihe ga-aga n'ihu maka paragraf a - ụgbọala Brabham so na Indianapolis 500 site n'etiti afọ 1960 ruo mmalite afọ 1970. Mgbe oru ngo na 1962, MRD nyere ọrụ na 1964 iji wuo chassis IndyCar nke ejiri igwe American Offenhauser mee ihe. Ihe kpatara BT12 chassis bụ Jack Brabham gbara ọsọ dị ka "Zink-Urschel Trackburner" na 1964
wee laa ezumike nká n'ihi nsogbu mmanụ ụgbọala. A banyere ụgbọ ala ahụ ọzọ na 1966, na-ewere ọnọdụ nke atọ maka Jim McElreath. Site na 1968 ruo 1970, Brabham laghachiri na Indianapolis, na mbido ya na ụdị 4.2-liter nke Repco V8 ndị otu ahụ jiri na Formula One <unk>nke Peter Revson ji mechaa nke ise na 1969 <unk>tupu ịlaghachi na engine Offenhauser maka 1970. Nchịkọta Brabham-Offenhauser banyere ọzọ na 1971 site na J.C. Agajanian, na-emecha nke ise n'aka Bill Vukovich II. Ọ bụ ezie na onweghị ụgbọ ala Brabham meriri na Indianapolis, McElreath meriri agbụrụ anọ nke United States Automobile Club (USAC) n'afọ 1965 na 1966 na BT12. "Dean Van Lines Special" nke Mario Andretti meriri na 1965 USAC mba onye mmeri bụ kpọmkwem oyiri nke a ụgbọ ala, mere na ikike si Brabham site Andretti si otu onyeisi Clint Brawner. Revson weghaara mmeri ikpeazụ nke Brabham na asọmpi USAC na BT25 na 1969, na-eji engine Repco.