ok heres the skinny on the s2000 motor. It does fit. is it a reasonable swap?? HELL NO!!! a shop in texas did both the s2000 and the RSX type S motor in 6th gen civics. The only reason they did this was to show the capabilities of there shop. I could'nt imagine the time and money that went into it. Plus its hard to get a f20c, my buddy sells them for 9500$ and theres almost no profit on it.

Judging by the fact that you own a Z06, i imagine you got some cash. So i agree with others on this post by saying the b18c5 is the best choice for the money. I can sell you one for 3700 plus shipping. unless you live in AZ