The Mopar 440-cubic-inch V8 belongs to Chrysler’s RB engine line with roots traced back to the original 413-cubic-inch big block, which came out in 1959. However, the RB lineage traces back to the previous year, as its foundation is the B-coded big block. While B and RB Mopar engine blocks allow similarly massive piston bore diameters up to 4.34 inches (and beyond for rebuilds), B engines had a relatively short stroke. The short 3.375-inch piston stroke limited the B’s
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