Hi, I want to build a 11ft. Hydroplane boat (inboard) from plans I can get from Clarkscraft.com. The plans say the boat can handle up to 48 CU. Inch, what motor would that be? I thought about a water cooled snowmobile engine around 600cc or so, sounds quite good actually. Can I use a snowmobile engine? I haven't found anyone doing it on you-tube or on the net so I'm little skeptic. Please help if you can, Thanks.