Candyapple Red, The 1969 Mustang got a new body, nearly 4 inches longer than the 1968 model. The Fastback was now called the Sportsroof. The Boss 429 was born of Ford's need to qualify 500 examples of its new racing engine for NASCAR. But instead of putting production units in the midsize Torinos it ran in stock-car racing, Ford offered the engines in the 69 and 70 Mustangs. It was a serious mill: four-bolt mains, a forged steel crankshaft, and big-port, staggered-valve aluminum heads with crescent-shaped combustion chambers, 735-cfm Holley with ram-air, an aluminum high-riser, and header-type exhaust manifolds. Outside, simple decals, front spoiler, Magnum 500 wheels and hood scoop (Body colour for 69, black for 70). 859 1969 Boss 429s were made, including 2 Boss Mercury Cougars