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8 The Dart block was stuffed with a forged rotating assembly, 9.0:1 compression and a hot hydraulic roller cam. The Procharger D-1 pumped just over 20 psi of boost through the Edelbrock RPM II induction system. Run with 20 psi of boost and 19 degrees of total timing on pump gas, the supercharged 331 stroker produced 659 hp and 594 lb-ft of torque. After the installation and tuning of the Snow Performance water/methanol and a jump in ignition timing to 26 degrees, the power jumped to 762 hp and 691 lb-ft (at the same boost pressure).