my suggestion would be to call jim up and ask about a 4mm trail setup.
just tell him word for word what you ride where you want power, blah blah.
then talk pipes, carbs, size of domes, etc.
he made me an 80hp duner that i could still trail ride with. was beyond pleased. asked for stock low end and then a broad mid and killer top end. but not a drag port.
here are some pic of my old jug. i thought the port work looked almost a machine did it really smooth.
i would call him at 918-232-3950. he might be hard to reach but leave a voicemail and try couple times a day he does work another job.
just talk to him.
if you put it together and need some jetting advice get back with me.