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The Boss 429 Mustang is a high-performance Ford Mustang variant that was offered by Ford in 1969 and 1970. Overview. The distinctive enormous valve covers on a semi ...
The Boss 302 was created to satisfy Trans Am rules and featured distinctive hockey-stick stripes, while the understated Boss 429 was created to homologate the Boss 429 engine (based on the new Ford 385 series engine) for NASCAR use. The two Boss models received fame on the track and street.
Later in the season, the Boss 429 engine was used by many of the teams, after it had finally been declared "officially homologated" by NASCAR president Bill France. The Boss 429 engine was homologated in the 1969 Ford Mustang Boss 429. In a very unusual move, Ford homologated the engine separately from the car in which it was to race.
A 429 cu in (7.0 L) version was also introduced the same year, with a 370 cu in (6.1 L) variant appearing in 1977. Produced until 1998, the 385 engines replaced the MEL engine entirely, along with multiple engines of the medium-block FE engine family; in truck applications, the engines succeeded the much larger Super Duty family.
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. The Boss ...
Later in the season, the Boss 429 engine was used by many of the teams, after it had finally been declared "officially homologated" by NASCAR president, Bill France. The Boss 429 engine was homologated in the 1969 Ford Mustang Boss 429. In a very unusual move, Ford homologated the engine separately from the car in which it was to race.
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.
351 Boss; 351 Cobra Jet; 302 Windsor V8; 351 Windsor V8; 400 Cleveland Ford 335 engine#400 V8 aka 400FMX certain 1973 casting numbers D1AE and D3AE, mated to the FMX transmission) 3.8/3.9/4.2L Canadian Essex 90° V6 (RWD only) 240 I6; 300 4.9 I6; 4.6L Modular V8 (first two casting runs, numbers F1AE and F2VE) 302 5.0L Windsor V8; 351 5.8L ...