http://www.hemmings.com/mus/stories/2006/08/01/hmn_buyers_guide1.html
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The standard suspension for 1971 Mustangs consisted of independent, unequal-length control arms, coil springs, angle-poised ball joints, tubular shocks, a link-type anti-roll bar up front, and a live axle with variable-rate semi-elliptical leaf springs and tubular shocks out back.