Wait, was the title of this thread "2012 Honda Concept.." when you started it? If this thread was a boat I would be sitting beside you. My own project has come across hurdles and needs for more parts and other makes and models....(lots of extra stuff, lots of changed directions) Just take your time, take a break and scroll around to look at other builds, makes models, girls...anything. When you have the solution it will hit you like an epiphany.
How about a couple small radiators (KX250) and...can you have cooling fins welded onto the block? Form and function + rad = cool