Only driveablity issue my neighbor had with a similar power capacity, was easy to fix. He added a small extension at the carb end of the throttle linkage lever, making it a little longer. The extra length ensured a smooth transition through the gas pedal movement. Initially the gas pedal put too much throttle movement early in the initial pedal travel which made it very jerky off the line and when shifting. I'll see if he can put a pic in here.