i'm kinda new 2 the whole nissan 4 banger deal i've had 6's mostly but would an SE-R head fit onto a 1.6l block 2 better the performance......any ideas would help me a lot.

no.
nissans are not like hondas, most head swaps dont work at all.

thanks man just needed 2 clarify on some things that have been on my head its cool....i'm workin on gettin' my Z-31 back into action