I'll know in a few weeks. The first short version goes on the give away engine that we are doing for Carlisle this year! If you come to the show you will be able to hear the engine run. We always have the engine we are givng away on a run stand and run the engine
"on the hour" during the day on Friday and Saturday.

Cam profile obviously has a major affect on "drivablity". Also I have learned that people have radically different opinions about what is "drivable" but I don't see it being an issue with the proper cam.