1970 Plymouth Road Runner. Scott Ross

change had shortened the name back to Warner Bros.

       The 1970 Road Runner convertible shows the same vertical-pattern grille that was used on the base Belvedere and Satellite series in 1970. Also seen here is the grille’s “dog bone” shape that the 1971 B-Body Plymouths wore. (Photo Courtesy David Newhardt)

      The 426 Hemi resided at the top of the Road Runner’s engine list and was conservatively rated at 425 hp. It carried the Bird to 60 mph in just 5.6 seconds, running the quarter-mile in 13.49 seconds.