Just to entice some of you, Ill throw some bare knowledge about the last of this breed here.

1974 was the last year of what was the B-body Road Runner. After that in 1975 the Road Runner moved into a different "body class". It became part of the Fury line, and was introduced as a "luxary" car. After 1975 the Road Runner moved on to become part of the Volare' line in 76, and was part of this till 1980. Even thought the Road Runners of 1976 - 1980 were really nothing more that a Volare' with an exterior trim option, and a 360 4bbl engine, it was still considered a great car in its class!

Here is a pic of a NICE 1977 Plymouth Road Runner (Thanks Leroy!!!):