Still, the single four-barrel carb 440 produced 375 horsepower, and when Chrysler came out with the 390-horsepower triple two-barrel Six Pack/6-BBL version in 1969, they suddenly had two drag engines.

Two years later, Chrysler hit the market with the 440 V8 engine, part of the company's RB family of V8 engines. Even though these V8 engines were from the same company and produced at the same ...