All you need is a tune for the lager engine and your done. You could even use the same head if you wanted or used the 2.3 one. That sucks dude. I dive mine hard and haven't ever hydro locked cause of the huge spash shield.
Also an under drive pulley wint really show that many benefits. Just ask turbo tom. And from my experiences you can cause problems from the accessories being under driven. Especially if you have an aftermarket stereo.
After asking a friend with 07 sedan if he wanted to race " I'm gonna loose! Mines not a zx4!! "