There was an article in Popular Mechanics a while back about a 400hp civic, they used a prebuilt engine for civic called "The Beast" i guess.
link:
http://www.popularmechanics.com/auto...s/1310471.html
in the mag they gave all the parts that went into it to make it this fast, but if i remeber correctly they said the only reason they got it to 400hp and it was reliable was because of the engine swap (figures), because the engine was built for the kind of turbo they put on it.