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The distinctive enormous valve covers on a semi-hemispherical head Boss 429 engine. The Boss 429 was produced in limited numbers in 1969 and 1970. Its origin is twofold: allow Ford to homologate its new Ford 385 engine-based semi-hemispherical 429 V8 for NASCAR racing, and to provide a big block alternative to the 5.0 L and under Trans Am ...
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.
Mandatory options were the top loader 4-speed, competition N case rear end (427, 428, 429, Boss 351, 351HO), and air conditioning delete. Vacuum-operated Ram Air was not available. However, the HO came with the first full-time cold air induction system in a Mustang, routing cold air via a two-piece plastic duct under the battery tray to the air ...
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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.
The Mustang made its first public appearance on a racetrack as pace car for the 1964 Indianapolis 500. [10] The same year, Mustangs won first and second in class at the Tour de France international rally. [100] In 1969, modified versions of the 428 Mach 1, Boss 429 and Boss 302 took 295 United States Auto Club-certified records at Bonneville ...
Ford released a handful of new details on its upcoming 2024 Mustang Dark Horse ahead of the Chicago Auto Show on Wednesday, giving enthusiasts a look at the exclusive paint and interior ...