go devil engine building project

I am building an engine like a go devil ,using a 66 horse 3cyl subaru car engine. It's peak power is at 5300 rpm's ,and it will be a direct drive 1:1 ratio. I am going to put it on a 14' lund and use it forhauling about 1000 lbs fully loadedup a shallow river. what prop should I use

 

That 1000lbs, is that total displacement, boat, motor, gear, fuel, passengers?
Gary

 

yes that is every thing

 

Well now that I’ve had a look at the GoDevil ( http://www.godevil.com/ ), I’m thinking I can’t help you. I might point out that you have about 3 times the hp you need and way to much rpm. This is a wild looking prop. I would talk to the people that build these things.
Gary