Its really a fun motor to run.
Some tips from memory: because the rotary valve is above the carb and its basically an updraft, its almost impossible to flood. It needs lots of choke to start cold and in my experience even some to start hot.
it was conceived as a "high speed" motor and runs best with the correct low-pitch prop designed for it. It will run with a J70 prop but not as well, An F70 prop has way too much pitch.
Happy putting!