You could run an octura 447 and the "monster" would barely get warm im guessin'.........................lets see, hmmmm, 27" vee, 5+/- h.p. brushless, 50,000rpms, 447 prop = 60-65 mph on glass?????? would you dare run a 450?????

P.S. - you beat me to this project, cuz i was gonna pull mine out of my 3905 to try it, but i was gonna go with a 72" vee i saw on e-bay, i'm very interested to see and hear about this..................i'm sorta livin' it thru you.