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The Boss 351 was the most potent high-performance variant of the 351C available only in the 1971 Boss 351 Mustang. Rated at 330 bhp (246 kW), it was fitted with a four-barrel Autolite model 4300-D spreadbore carburetor, an aluminum intake manifold, solid lifters, dual-point distributor, a six-quart oil pan, and cast-aluminum valve covers.
There were again three 351 Cleveland engine options for 1972. A 2-barrel, the 4-barrel 351CJ, and a new R-code 351HO, essentially a lower compression Boss 351 engine. 1971 Ford Mustang Mach 1. The Mach 1 received appearance updates for 1973. The lower body accent paint and bright trim were gone and the entire car was one color from top to bottom.
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.
All of Ford's mainstream V8 engines were replaced by the overhead cam Modular family in the 1990s and the company introduced a new large architecture, the Boss family, for 2010. 1920–1932 Lincoln 60 Degree Fork & Blade V8 —(357.8 and 384.8 cu in (5.9 and 6.3 L))
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.
The Boss 302 Mustang was offered only for the 1969 and 1970 model years. In the January 2010 issue of Hot Rod magazine, a Boss 302 engine built to the exact specifications, settings, and conditions of the original engine was tested. It produced 372 hp at 6,800 rpm (650 rpm over the original engine’s redline) and 325 lb-ft of torque at 4,200 rpm.
Ford Mustang (1970-1973) Ford Mustang Boss 351 (1970) Ford Ranchero (1970-1971) Ford Torino (1970) Ford Torino Cobra (1970-1971) Ford Torino King Cobra (1970) GMC Sprint (1970-1972) Lincoln Continental (1970-1979) Mercury Cyclone (1970-1971) Oldsmobile Rallye 350 (1970) Oldsmobile Toronado (1970-1978) Plymouth Barracuda (1970-1974)
351 Cleveland V8 (not the 351 Cleveland M-block engine) 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 ...