Who told you not to turbo this engine?? That would pretty much be my dream combo for my car. I'm currently doing a turbo 6.1. May want to maybe consider a beefier piston, but I only say this because I'm not sure what those pistons look like. What rods do you have? I too would also really consider EFI. Plus with E85, I think you'll make a bazillion hp.

Those engines have some pretty kick ass parts in them. It is obviously going to require a cam, convertor and gear change.