Jared, no offense, but unless you get a motor specifically for that type of drag that the waterpump is putting out, you're spinning your wheels. You can buy an electric pump setup through
www.batinc.net that is fairly straight forward for installation.
The main caution I have for you is to check and recheck your flow circuits to make sure you're getting water everywhere in the right direction. I've seen several setups where the guys have missed a single hose fitting and completely bypassed the engine in their setup.
Rick