340MAGNUM.COM

The classic Chrysler small block engine reached its performance peak with the 340 cubic inch version in 1968. This "big bore" variation of the classic 318 V8 significantly increased power output while retaining the fast-revving relatively short stroke of its parent. Along with the displacement increase, 340 engines came with four barrel carburetors, performance-oriented intake and exhaust manifolds, large port heads with bigger intake and exhaust valves, and, in most years, forged crankshafts... Chrysler 340 engines were found in many of the best muscle and ponycars of the era; from Valiant and Dart compacts and their coupe derivatives, the Duster and Demon (or Dart Sport), Barracuda and Challenger, Charger, and Roadrunner. The delivered excellent performance while their lighter weight (compared to the Chrysler big block engines and Hemis) allowed considerably more nimble handling. This is especially true in the lightweight A-body compacts, where 340 Dusters and Demons became street..