z6 question

Ok, I don't normally mess with many sohc's. A friend of mine wants to buy my y8 head and use on his z6 block, I know this set up has been done a lot, as far as the head bolts is my only question. He needs to use the z6 bolts other that the 2 ones in the back corner right ? They should be the y8 ones witch I have?
Just looking for clarification
Just looking for clarification