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The Boss 429 engine came standard with a 735 CFM Holley 4-barrel carburetor mounted on an aluminum intake manifold that flowed well for its time. [ 1 ] 1969 cars featured hydraulic lifters, switched to solid lifters in 1970 models to minimize valve float at high RPMs; the dual exhaust system was improved, but rated power stayed the same.
Boss is the internal name for a family of large-displacement V8 engines from Ford Motor Company intended to compete with Chrysler's Hemi and General Motors' 6.0 L Vortec engines. Originally named Hurricane , development of the engine was cancelled in 2005, then revived in early 2006 by Mark Fields [ 1 ] In light of the devastation caused by ...
1963–1971 Ford Indy V8 engine (U.S.A.C. IndyCar engine) 1968–1997 385 V8—big-block (370/429/Boss 429/460/514) 1975–2007 Ford-Cosworth Indy V8 engine (U.S.A.C. IndyCar engine) 1970–1982 335/Cleveland V8— small-block (351 Cleveland/400/351M/Boss 351) 1969–1982 Ford Australia produced Cleveland V8 engines 302/351 (Geelong plant)
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.
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 smallest-displacement engine of the 385 engine family, the 370 was introduced in 1977, replacing the 361 cu in (5.9 L) 360 Truck (FT) V8. Sharing its 3.59-inch stroke with the 429, the 370 was designed with a downsized 4.05-inch bore (shared with its predecessor and the 390 V8). For 1979, the engine was rebranded in metric, as 6.1 L. [2]