Introduced in 1966 as an upscale, high-performance variant of the Belvedere, the Plymouth GTX remained in production as a stand-alone nameplate for only five years. But even though Plymouth axed "the ...

Envisioned as a more affordable performance-focused model of Plymouth’s upscale GTX – the gentleman’s muscle car, according to popular opinion – Road Runners ended up engulfing the latter moniker by ...