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The 1971 Mustang - introduced in September
1970 - was green-lighted by Ford's new president, Semon "Bunkie"
Knudsen, formerly of General Motors. Again, the revised model grew
in size, gaining 3 inches in width in order to accommodate Ford's
big block 429 cu in (7.0 L) V8 without need for an extensive
As in model years previous, there were three body styles offered:
Hardtop (available in base or Grande trim), Sportsroof (available in
base or Mach 1 trim), and Convertible (no specific trim packages
The new 1971 hardtop featured a prominent "tunnelback" rear window
design with flowing rear pillars, a completion of the styling
exercise of the outgoing 1970 model. Hardtops with 'Grande' trim
gained a vinyl roof and Grande badges on the C-pillars.
An additional edition, the Spring Special, was available between
March and May 1971, which added Mach 1 styling cues (side stripes,
tu-tone paint, urethane bumper, honeycomb grill with sportlamps) to
Sportsroof models were available in base configurations in addition
to the Mach 1 and Boss 351 sport/performance options.
The Mach 1s were available with two-tone paint schemes, optional
hockey-stick stripes, NACA (NASA) hood scoops (functional on
examples ordered with Ram Air), color keyed side mirrors, and
additional sports/performance options. All Mach 1 models came stock
with urethane front bumpers and an alternate grille equipped with
amber sportlights. Though the Mach 1 is often associated with the
NACA hood (a no-cost option) and other styling cues, base Mach 1s
could be had with the standard hood and the 302 2V engine.
Boss 351 examples were similar in appearance to the Mach 1, and
included a larger black-out hood than Mach 1's, front and rear
spoilers, dual exhaust with no rear valance cutouts, and chrome
bumpers paired with the sportlamp grille.
Convertibles were equipped with a power top and a glass rear window.
The 1973 models were the last Mustangs available as a convertible
until 1982- the '83 model year. Convertibles featured no unique
exterior visual package of their own during their first year of