Look up Bisimoto and his build. That will put you in the right direction. Bisi is quite possibly the most reknowned D series N/A engine builder in the world.
Also let it be known you are going to spend a lot more money that the guys with B's and K series engines.
First piece of advice, put this in the correct forum section for better views and more advice N/A isn't forced induction. Second piece of advice, go boost unless you have really deep pockets and/or sponsors