Try a Silver Bullet 64(no gate), Drag Comp and water/meth. I made 626 HP at the wheels and it was only on level 3x3. They told me to put street tires on before I turned it up any further because it was squatting the drag radials too much and walking to the edge of the dyno rollers. This is a Blue Chip VP-X pump.
I am switching to a BW 67.7 turbo, race cover, billet wheel and a Steed Manifold with a Gate to try and increase power along with Mach 7 sticks. Then Im adding nitrous to see what happens.