It replaced the Willys Go Devil engine that was used in the MB Jeep and other early Jeep-based models like the Jeepster.

This allowed the valves to be larger and the combustion chamber to be smaller, improving flow and increasing the compression ratio.

The gross power and torque outputs decreased to 72 hp (54 kW; 73 PS) and 112 lb⋅ft (152 N⋅m), respectively, when the engine had a 6.9:1 compression ratio.

[2] Production of this engine continued through 1971, which was after American Motors Corporation (AMC) purchased Kaiser Jeep in 1970.

[8] 3000 The 3 L version is almost identical to the BF-161 engine, with the stroke increased to 4 inches (101.6 mm), giving it a displacement of 3,016.5 cc (184.1 cu in).

After Ford acquired Willys-Overland do Brasil, they reverted the engine to its former head design with an integral intake manifold.

Ford also improved the cooling between cylinders 5 and 6 as well as incorporating a side-mounted oil filter instead of the front-mounted, hose-connected system designed by Willys.