how hard is swapping an f22a1 head for a f22b1 head? im guessing i need to the ECU from anything with an f22b1 in it to control the vtec. is this worth doing if i can find the head cheap enough? does anyone know of anyone who has done this? how hard is wiring up the vtec? sorry so many questions...just trying to get this all straight in my head before i pull my cylinder head off. 