Is it gonna be for track or drag use?
Couple cool sites to check out if you haven't..
http://www.b-20.net
http://www.cr-vtec.com
Lotsa cool stuff there
Big turbo setup I'd even stick to a B16A, but a B18C1 with a JRSC is cool too - personally, if I was building up a Civic for track use, I'd stick NA, but that's me
Toda B spec cams and gears, or better yet, JUN stage III kit.. mmm.. you could build it to a high 13 sec car in no time flat.. mm..
Only downside I see to my plan - you'll be at three trillion rpm all the time!