Grabber Yellow. Fords Pony car, the Mustang was first introduced in April, 1964. The Mustang began to get fat and lazy, bigger and heavier in 1971. Outside they got a chrome strip on the edge of the front fenders and hood, bold triple lens tail lights and flush door handles. Inside the instrument layout was all new and power windows available for the first time. Hardtops, Convertibles and Sportsroofs still available. Models were the Standard Mustang and the luxury Grande, the sporty Mach 1 Sportsroof came with a V8. The R Code Boss 351 was the high-performance Mustang, available only in the 1971, Rated at around 330hp, it was fitted with a 4 barrel carburetor, and aluminum intake manifold. It had four-bolt main block/caps and a premium crankshaft, modified head for better airflow and solid lifters were used. The Boss 351 also got better suspension, 'Hurst' shifter, disc brakes, blacked out NASA scooped hood with locks and special body side stripes. 1,806 Boss 351 Mustangs were built.