But he isnt building a 402 BBC. He's building a very mild 318 - in his words.
Know your audience. If a novice is asking these kinds of questions such as the OP is asking, ego can lead you down the wrong path pretty quickly. Bigger isn't always better. When I built engines for a living, this was a weekly occurrence. Had customers asking for all-out race parts when all they wanted to do was cruise and impress their friends.