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I hate to say it but, 220 crank hp is going to take some head and cam work. I'm in the planning stages of my NA 3400 buildup and I'm looking at 3500 peads, UIM, LIM custom cam and 65mm TB for 250hp, 270ftlbs. With the smaller bore you've got it's going to be even harder to build power, not that substantially, but harder. for 220hp, off the top of my head, you're gonna need a WOT stage 2 cam, UIM, LIM, 62mmTB, headers and a fairly agressive PMC tune, should get you there, but you may need head work too, unfortunately you don't want to use 3400 or 3500 heads because you'll loose way too much compression due to the lack of bore. If you were going all out turbo or SC you might be able to pull off the 3500 heads as they'll give you a great quench area, so long as the valves don't hit, which I don't know one way or the other.
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