Wow some of you guys really don't know anything about engines, and I thought I was dumb
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1. A b18c5 will work with boost IF you lower the compression ratio, but if you do that it is essentially the same engine as the b18c1, only it costs a couple thousand more. About the b18c6/7, good luck finding one around. Euro engines aren't as plentiful as JDM due to mileage laws in Japan.
2. The Skyline IS coming to America. In fact, its already here. Check my sig.