If memory serves, Frank was getting 103/104, on VP (oxidenated fuel) using a Microtec ECU (I think)... The last mod was a set of heads from Canada, which, in addition to the cams, valves, etc. The intake (exhaust?) tracks were D shaped to increase the flow (velocity) kind of an old trick design folks have been playing around with for years. I am gonna guess NCR cams. Prolly going for as much compression as possible without ruining reliability. Not sure on the bore and stroke, but I am, again, guessing,.... as much as possible!!! Chris Boy @ MotoCorse in Florida is building similar air coolers.... the sound is incredible.