WOW sorry for the late reply.. Did you finish your build? I jsut finish my stage 2. Gt42 build.. 600cc should be good for those hp.. I think it might max out if you use the stock.. Yes E85 requires much bigger injectors say 1600cc. You probably need to convert your fuel rail and it a return system. If you are on E85 its going to fly!!! It'll be like running 103 octane and it'll run cooler. However your MPG will go down..

Hey man,
I'm working on a single build myself over on the SW part of the Cities. I saw you just picked up those 600cc injectors. Those are the same ones I'm thinking for my build and should take you to the limits of the stock block with no problem. I'm planning on 375 whp until I build the block (down the road). The only thing I was thinking is maybe bigger if I went for E85.

MJ