Plymouth produced more than 36,000 Road Runners for the 1970 model year, but only 658 were specified with convertible tops.

Between 1968 and 1970, the Road Runner ran untouched with a dedicated ... mating the 6.3-liter block with cylinder heads from the big-brother 440 ‘RB’ Super Commando powerhouse.

Prices shown are the prices you can expect to pay for a 1970 Plymouth Road Runner 2 Door Hardtop (440 3x2) across different levels of condition. Edit options.

However, the Plymouth Road Runner would soldier on with ... while the 426 Hemi and 440 Six-Barrel engines remained optional ...

If not for the 426 Street Hemi, which was the dominant engine of the Golden Age of American muscle, the 440 Six Pack would have been the greatest V-8 of the classic era. With three two-barrel ...