It'll work great! I've seen each half of this combo at work and was impressed.
1.) A neighbor bought one of these trikes and put a B/S 3hp motor on it, geared 9:1 and a centrifugal clutch. Kinda tippy, but a real hoot. Did about 30- 35 mph.
2.) I saw one of those motors on a 10 speed zipping up the street by our house. At the next traffic light, the guy told me it works great and 30-35 mph is no problem. Very neat set-up for a bike.
Please keep us posted. I'm a trike fanatic, and I'm sure CrazyCart will jump in soon!