Underneath the skin, the Road Runner lived up to its persona. The 335-hp 383 was one of fastest 383s Chrysler built because it was fitted with the 440 camshaft, heads, and manifolds for even more performance. The 440 Six Pack car generated 390 hp and gained a reputation as a stout street performer. And at the top, the conservatively rated 425-hp 426 Hemi set the standard for performance. The Road Runner was lighter than the Cuda and somewhat overbuilt as it was one of the toughest and most consistent muscle cars. To transfer all this power to the ground, the Road Runner was equipped with the A-833 4-speed or TorqueFlite 727 automatic. With a torsion-bar suspension and heavy-duty rear end, the Road Runner handled well. However, these are just a few of the highlights of this complete story. Each volume in the In Detail Series provides an introduction and historical overview, an explanation of the design and concepts involved in creating the car, a look at marketing and promotion, an in-depth study of all hardware and available options, as well as an examination of where the car is on the market today. Also included are paint and option codes, VIN and build tag decoders, as well as production numbers.