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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.
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 Racing bred small block Boss 302 Mustang .
The Boss 429 Mustang debuted in January 1969. It was built primarily to allow Ford to campaign the special engine in the NASCAR racing circuit. NASCAR's rules stated that for any "trick" part or engine to be considered legal, it had to be installed on at least 500 cars that were sold to the public. The Boss 429 engine was rated at over 370 hp.
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The Mach 1 proved popular with buyers with 72,458 cars sold through 1969. [66] 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 ...
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 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.
Sorensen's auto collection features the most valuable motorcycle in the world, Steve McQueen's Von Dutch 1929 Scott 596cc Super Squirrel, [43] a rare Ray Allen world champion 1970 Chevelle, [44] and a 1969 Mercury Cyclone Boss 429 NASCAR (winner of the 1969 NASCAR circuit). [45] Tonny Sorensen's Von Dutch-restored 1929 Super Squirrel.