This powerful 1969 Plymouth Road Runner, upgraded with a 440 Six Pack V8 engine and A-833 4-speed transmission, is an exceptional muscle car gem.

A drag-spec car for most of its active life, this 1970 Plymouth Road Runner is now a Concours-ready classic. It packs the rare Six-Barrel V8.

Plymouth discontinued the GTX as a stand-alone model in 1971, but the badge survived on the range-topping Road Runner through 1974.

The 440 Super Commando was Plymouth's name for its version. In addition to its GTX and Fury models, Plymouth offered the 440 Super Commando in the 1970-71 'Cuda and the 1970 Road Runner Superbird.

The 1969 Plymouth Road Runner provided drivers with the rare combination of affordability with speed and power. But what was under the hood of this iconic car?

Feature on garage-find 1970 Plymouth Road Runner 440+6 converbile.

When the Road Runner 440 Six Pack was introduced, the man called up Mr. Norm’s Grand Spaulding Dodge and asked if it was possible to shoehorn the motor into his wagon.

Ronnie Rohde's 1970 Plymouth Road Runner was an eBay purchase that looked nothing like its pictures, so he got to work making it the cruiser of his dreams!

Supercharged, Viper V10-Powered Plymouth GTX Takes SRT Back To The ’60s Engine-swapped classic Mopar muscle car was originally equipped with a 440 cu-in, 7.2-liter V8 ...