brushless BlackJack 55" Boat Suggestions?

[aqwut]

Hey guys,
I've been playing with boats for a little while now.. I really don't have much experience with brushless boats..

I picked up a Blackjack 55" for around $400 from a buddy.. with everything except the Tx/Rx. I'm unsure which Motor to use for this baby.

Would the 2250, 2280 Lehners be too small for them?...
I will get a very low KV motor, say some where around 400-500 rpm/volt.

I will be running around 40-50 Volts...
ESC, I will be using 40160WK, Jeti Spin 200, or Maybe The Lutach ESC, if it get's here in time.. :)

So for that size boat, would I need to get the 3060 or 2230/1.5Y... well, if I need to get the 30 series motors, I might as well get the 3080... What do you guys think?...

I'm unsure how many RPMs those Gasoline Zenoah G26 engines run, whatever they run, I will try to match that rpm with my batteries and motors... I would like to use the Lowest RPM motors to achieve this.. I like to have the higher voltage stuff.

I'm sure someone knows something :)