Check out this sweet Meziere Enterprises Electric Water Pump that reduces the horsepower loss from having a belt driven pump on the front of your engine - 5.0 Mustang & Super Fords Magazine ...

Run sans water/methanol with the timing pegged at 17 degrees (safe level on pump gas), the supercharged stroker 4.6L produced 589 hp and 477 lb-ft of torque.