why build it? I guess I'm just studying my options really...and I wonder if it makes more sense to have 400~450 hp on 87 octane than 450~500 on 93 octane. This will be for my AAR which would be just a family cruiser. On the other end of the spectrum I would seriously consider an engine built strictly for E85 since it's locally available in my area. The only gripe I have with the E85 situation is when I drive out of my local area and there's no E85 to gas up with, then I need to carry $$$ of octane boost in my trunk.
I think it would be neat to find a killer combo that's compatible with 87 octane cheapie gas.