Hey crazy,tep thats a Mean machine.If you want to run this for sport,I would go with a 9 or 10 xl on the 14 cells with a 42 to 45 mm prop.Feago,Nemisis,or Hacker makes that motor.A Hacker 77,or any good 60 to 70 amp speedo should do the trick.When you build the boat keep the rudder close to the transom to help it from spinning out.
For competition.Sharpen the sponsons and up the anty to 18 or 24 cells with an 11XL and a 440 prop and hold on to your cahonys.