The 1972 Dodge Dart Swinger never wore a big-block badge, but do not let the compact A-body fool you — Dodge tucked a 240-horse 340 V8 under that unassuming hood for buyers who knew what to look for. Add in a mid-year facelift and sales north of 200,000 units across the Dart lineup, and you have got one of Mopars most underrated sleepers hiding in plain sight.