Yeah, I've seen you over at TOO.com. I'd just like to remind you that Larry's power numbers from single cam engines never seem to add up. He obtains numbers using a Motec (which is a $five-figure stand alone engine management system with an internal weather station - it is always optimising fuel mixtures while taking temperature, barometric pressure, humidity, and a host of other factors into account, and that's why he gets such good numbers on the dyno), and I remember him even saying recently that in general, B series are more practical for building, even though he prefers to work with D series engines. Remember that Phil Hooper's D series engine, with both the engine and blower worked on by Larry, only puts down 190 real world whp (i.e. without a Motec, Speed Pro, or other advanced engine management system).
If you so choose, work with your single cam, and best of luck. But my advice stands: start with a B series.