Brabham cars competed at the Indianapolis 500 from the mid-1960s to the early 1970s. After an abortive project in 1962, MRD was commissioned in 1964 to build an IndyCar chassis powered by an American Offenhauser engine. The resultant BT12 chassis was raced by Jack Brabham as the "Zink-Urschel Trackburner" at the 1964 event and retired with a fuel tank problem. The car was entered again in 1966, taking a third place for Jim McElreath. From 1968 to 1970, Brabham returned to Indianapolis, at first with a 4.2-litre version of the Repco V8 the team used in Formula One—with which Peter Revson finished fifth in 1969—before reverting to the Offenhauser engine for 1970. The Brabham-Offenhauser combination was entered again in 1971 by J.C. Agajanian, finishing fifth in the hands of Bill Vukovich II. Although no Brabham car ever won at Indianapolis, McElreath won four United States Automobile Club (USAC) races over 1965 and 1966 in the BT12. The "Dean Van Lines Special" in which Mario Andretti won the 1965 USAC national championship was a direct copy of this car, made with permission from Brabham by Andretti's crew chief Clint Brawner. Revson took Brabham's final USAC race win in a BT25 in 1969, using the Repco engine.