You can leave the boost at the high end of stock settings, or ~14psi, for now. If you are getting smoke and EGT's are low enough, then turn up the boost. I don't think that will be a problem though. About the IC, I personally like air-to-air, since otherwise you have liquid plumbing to deal with, and then you have to cool the water - sounds like more work to me, with less benefit? I'd try to copy Ridge's setup if you could, it looked fabulous, I'm disapppointed he never increased the fuel delivery after all that top-notch mechanical fabrication...