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The Boss 429 Mustang is a high-performance Ford Mustang variant that was offered ... In 2013 an unrestored black 1969 Boss 429 sold for $417,000 at Mecum Auctions in ...
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.
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 Boss 302 and Boss 429 were discontinued, with both Boss engines and the 428 Cobra Jet replaced by a 370 hp 429 Cobra Jet V8 (with or without Ram Air). [ 33 ] For 1972, Ford adopted SAE net horsepower ratings, leading to a numerical decrease in advertised engine output.
The 429 Cobra Jet with Ram Air was the standard engine for the Cyclone Spoiler, with the 429 Super Cobra Jet with Drag Pak and Super Drag Pak optional. The Super Cobra Jet upgraded the block to four main bolts and provided a mechanical flat-tappet camshaft, and the carburetor was changed from a 720 cfm Rochester QuadraJet to a 780 cfm Holley.
At mid-year, Ford offered a slightly detuned Boss 351 engine, which could be ordered with any model. A total of 398 Mustangs were built with the drag race-oriented R code engine and were designated as the 351 HO. Mandatory options were the top loader 4-speed, competition N case rear end (427, 428, 429, Boss 351, 351HO), and air conditioning delete.
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It was available in three colors: Dark Highland Green, True Blue, and Black. The success of the 2001 Bullitt led to the production of a second special edition, the 2003 to 2004 Mach 1 . The Mach 1 was equipped with a 4.6 L DOHC 305 hp (227 kW) engine based on the engine available in the 1999 and 2001 Mustang Cobras, with new cylinder heads from ...
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