Plymouth built the Road Runner to be cheap, honest, and fast, a muscle car for buyers who could not afford one. But the 1968 example Jeff Fleming shares with Lou Costabile hides the most feared engine Chrysler ever built beneath its budget bodywork: the legendary 426 Hemi. Finished in striking blue and idling with that unmistakable menace, it turns the cartoon-bird image into something far more serious. Watch and hear why a genuine Hemi Road Runner is such a rare prize.