Why did you make a second thread about this? And second, I'm not 100% sure about this, but from what I was told (by the person who did my work) a DOHC zc head would go onto an Si block, but you would have to have the block machined in various places in order for it to work. BUT, then raises the question... WHY?

Go back to the first thread you made, and do like me and POS have said, put a d16y8 head onto your 1.6 block and be happy with it.