my friend jared had a fully built y7 that went high 13's on nitrous... for those of you that remember (built hatch) so sure you could.. a word of advice ( NO DISRESPECT) but do not try to port and polish your own head... there are PLENTY of great DIY things out there.. this imho is not one of them... let a profesional do it.. but outside of that it is up to you.. i personaly would get the Y8 head... and if you don't want to put a bseries in there.. then don't.. its YOUR car..