Thank you all for the info. Now I have another question to ask. The engine builder asked if my fuel tank, fuel pump and fuel lines would support E85? He is telling me that I might have to run a race gas / premium gas mix. He is saying if I go with E85 the octane will not be an issue. He also said it will run more consistent and cooler with E85 and it also does not cost $8 a gallon. I know it will use twice as much E85 but with the cost of it, it might be cheaper. I have to buy a carburetor not matter which way I go.

Thank you Chris