The Boss 302 Mustang was designed by Larry Shinoda, a former GM employee. The car featured reflective "c-stripe" and the fake rear fender scoops of the regular 1969 Mustangs was eliminated. Optional were black horizontal rear window shades and a blackout hood. It was one of the first production models with a front spoiler and rear deck wing. The name "Boss" came about when Shinoda was asked what project he was working on, he answered "the boss's car" because the project was a secret. Also Shinoda had called it the "Boss" as an homage to the new President of Ford Semon "Bunkie" Knudson who had brought Shinoda over from GM when Knudson had left.
Changes for the 1970 model year included side "hockey stick" stripes which started along the top of the hood, along with the 1970 grille which replaced the 4 headlights with two vents in the outside position while retaining dual headlights within the grille opening. The dual exhaust system was redesigned, along with the competition suspension and a standard Hurst shifter. The intake valves were smaller, and aluminum valve covers replaced the chrome. With a suggested price of offered for $3,720, a total of 7,013 were sold.
Standard were disc brakes on the front, larger sway bars,a lower ride height, heavier duty spindles, reinforced shock towers, a four speed manual transmission, and the solid-lifter Boss 302V8 engine with its free-breathing Cleveland style heads, which had valves larger than most motors over a third larger in displacement. This "G Code" engine was rated at 290 hp (216 kW), however modern day tests show the engine may have been largely underrated, with dyno's showing in excess of 380 horsepower in some cases.
The 1970 car could accelerate from 0-60 mph (97 km/h) in 6.9 seconds. The quarter mile (~400 m) took 14.6 seconds at 98 mph (158 km/h).
Although Ford's Drag Pack option with a special oil cooler was never formally offered on the Boss 302, it was often included with the 4.30:1 rear axle ratio. This coveted option is recognizable when the hood is opened to reveal Ford's vertically mounted oil cooler in front of the radiator. Ford also had a option for Boss 302's and 429's for deluxe interior rather than standard interior
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