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Although it was sold for only seven model years, the life of the Plymouth Duster spans the automotive landscape of the 1970s. The two-door Duster, the fastback flagship of Plymouth's long-serving, entry-level Valiant line, debuted in the 1970 model year - arguably the peak of the muscle car era. A 275-hp (gross), 340-cubic-inch V-8 propelled top-spec Duster 340s with sufficient gusto, while budget-friendly engine options, ranging from two slant sixes to a 318-cubic-inch V-8, helped put the sporty Plymouth - albeit far less fierce than the Road Runner or the 'Cuda - in 217,192 driveways that year, making it the brand's most popular car.