Engine Block 440 Mopar 1969 Charger Road Runner Chrysler 4.380-inch bore

Stroke Compatibility: 3.75 in. 1969Mopar 440 RB Big-Block Engine Block —. 060 Over (452 CID). Current Bore: 4.380 in. Larger bore supportshigher airflow, improved torque potential, and modern piston options.

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