The 1968 Plymouth Road Runner was built to bring performance back to buyers who could not afford a GTX, which makes the 426 Hemi option one of the strangest contradictions Detroit ever offered. A stripped-out car with rubber floor mats and a cartoon bird on the fender could be ordered with the most feared engine in America. Car and Driver clocked one at 13.54 seconds at 105 mph straight off the showroom floor. Read on for what that combination actually cost and how few buyers took it.