ohmy, I'm another that thinks you should sell this to Honda enthusiasts (ricers) as is and get a proper (used) engine already tuned for efficiency.
Try this forum for the sale:
http://www.honda-tech.com/
Of course, if you relish a challenge, feel free to swap parts from now until the Second Coming ... but I think the prudent move is to swap the entire engine/transaxle in one go.
Hondas are well designed to work easily and efficiently right from the factory. Second guessing their component choices is not a game for amateurs and DIYers (like myself).
Best of luck, regardless ...
