Though not as famous as other Mopar legends, these five underrated models packed some serious muscle and deserve more respect ...

Sure, the 440-cubic-inch (7.2-liter) had been offered briefly in 1969, but the 426-cubic-inch (7.0-liter) Hemi wasn't an option outside the limited-edition Super Stock race car of 1968.

the company started producing the 426 Hemi V8 engine, the revamped brand of hemispherical engines that had been out of commission since 1958. Two years later, Chrysler hit the market with the 440 ...