1969 Plymouth Road Runner 440 Six Pack

One of the most potent and quick muscle cars of 1969 was the Plymouth Road Runner A12 package, which had a large block

440 "Six Pack" engine. 390 horsepower and 490 lb-ft of torque were generated by the 1969 Road Runner 440 Six Pack.

With the addition of three dual-throat Holey carburetors, heavy-duty valve springs, and an aluminum Edelbrock intake manifold,

the Road Runner 440 Six Pack effectively filled the gap between the standard 383-cubic-inch model and the HEMI.

The A12 Road runner completed a quarter-mile in 13.88 seconds at 106.13 mph in a test run by Speed and Supercar magazine.