The Valiant Duster Coupe was the main catalyst of Plymouth's growing sales in 1970, while the Road Runner lost ground, primarily as the market was ready to leave big engines and large cars behind. The ...
Introduced for the 1968 model year as Plymouth's most affordable muscle car, the Road Runner lost its high-compression V8 options after the 1971 model year (like all Mopars). But unlike the GTX, which ...