With that power goal, you can just boost the B16. Many stock B16 could make your power goal easily, and you plan to use forged internals so 250 should be no problem at all.

http://forums.evans-tuning.com/viewt...2493&highlight
http://honda-tech.com/zerothread?id=837796
http://honda-tech.com/zerothread?id=1756923
http://honda-tech.com/zerothread?id=1757776\

There are more on HT, search!