1971 Ford Mustang Mach 1
In 1971, the Mach 1 started with a base engine of the 302ci based Windsor motor, with a 2 barrel carburetor, followed by four optional 351 Cleveland engines - the 2-V, 4-V (Venturi), the C.J. (Cobra Jet) and H.O. (High Output) BOSS 351.
In 1972, the 429CJ & SCJ's were dropped from the lineup, and horsepower dropped across the board due to the switch to new SAE net horsepower calculations. The following year also produced the fewest Mach 1 sales of the 1971-73 generation. There are no major differences in the '71 and '72 Mustangs externally, other than the addition of a "Mustang" script on the right side of the trunk panel (excluding Mach 1).
One of the most recognizable features of the '71-'73 Mustangs is the optional (standard on Boss 351) NACA (NASA) hood design with dual scoops.