y8 is a high compression single cam. anyway, are you going to get it chipped and tuned? if so you can run 10-12 daily and 14-16 aggressively but thats pushing it. your going to have to put some good time in on the dyno to get tuned at above 12. i would stick around 10 untill you can afford to put money into internals. at that point you can up the boost and do it safely.