It's actually the Slant-Six, which Dodge offered in two sizes in 1971. The Challenger came standard with a one-barrel 198-cubic-inch (3.2-liter) six-cylinder rated at 125 horsepower. The options ...

The rig in question is a 1980 Dodge D150 with the 225-cubic-inch power plant. In case you’re unfamiliar with the slant-six, it’s essentially an inline engine that’s leaned 30 degrees to the ...