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The Mustang Boss 302 is a high-performance 302 cu in (4.9 L) H.O. V8-powered variant of the Ford Mustang originally produced by Ford in 1969 and 1970. Developed to meet homologation requirements to compete in Trans Am racing, it was Ford's response to the success of the Chevrolet Camaro Z/28 in the 5 L (305.1 cu in) and under SCCA series since 1967.
The Ford Boss 302 (formally the "302 H.O.") is a high-performance "small block" 302 cu in (4.9 L) V8 engine manufactured by Ford Motor Company.The original version of this engine was used in the 1969 and 1970 Boss 302 Mustangs and Cougar Eliminators and was constructed by attaching heads designed for the planned 351 Cleveland (which debuted the following year) to a Ford small block. [1]
The Boss 302 Mustang was offered only for the 1969 and 1970 model years. In the January 2010 issue of Hot Rod magazine, a Boss 302 engine built to the exact specifications, settings, and conditions of the original engine was tested. It produced 372 hp at 6,800 rpm (650 rpm over the original engine’s redline) and 325 lb-ft of torque at 4,200 rpm.
The only known exception is a factory equipped Boss 302 Mustang with the Drag Pack option, which was not marketed by Ford as such, or by any other name. [1] At the start of the 1970 model year, Ford began installing the Drag Pack on approximately 10% of Boss 302 Mustangs. For those who were aware of it, this free Drag Pack upgrade was available ...
The 1969 Ford Mustang featured numerous performance-themed model names and engines. Six factory performance Mustang models were available (GT, Boss 302, Boss 429, Shelby GT350, Shelby GT500, and the Mach 1). Additionally, seven variations of V8s were available in the 1969 through 1973 models; most of these were also available in the new Mach 1.
It was based on the Mustang SportsRoof model and replaced both the Boss 302 and the Boss 429 models. The Boss 351 engine was a 351 Cleveland four barrel engine with a mechanical cam, solid lifters, 11.0:1 compression ratio, aluminum intake, and a 4 bolt main bearing block. It was topped with an all-new 750 CFM Ford 4 barrel carburetor.