The Dodge Challenger, introduced in late 1969 for the 1970 model year, was built on the new E-body platform created to handle Chrysler's big block engines, including the 440 Six Pack.

02Our starting point is a 440 "F" block, denoting an engine built for the 1970 model year. The block had previously been built by a mass remanufacturer, and the bores measured 0.040-inch over.

Offered as standard equipment in Dodge's Charger R/T and Coronet R/T models, the '69 Dart's E86 four-barrel 440 motor was effectively a bored and stroked (4.32x3.75 inches) raised-block version of ...

Rated at 350 gross horsepower in 1971, the 440 V8 was advertised with 280 net horsepower for the 1972 model year. ... but it does come with its numbers-matching 440 engine block.