Captcrunch44, how about Milling up a High'er Ratio Rocker Arm ?? you wont need to go that far with it,
I would think you don't want that much more RPM, it will be hard on the Rods, so putting a High'er Ratio Rocker on the intake should work well,
BTW, if you need a larger OD Push Rod Tube just buy a larger one from Satio or from some other brand and cut it down, and Mill out the Head and Cam Cover, don't forget the larger Tube Seals
Jim