I have hydraulic followers. So the the valves will not be opened farther? They adjust themselves on the cam upstroke and keep their "setting" when the cam opens the valves? I have heard of one place that heats the head and straightens it, eliminating the need to rebore the cam bearings.
If reboring the cam bearing after milling the bottom of the head is feasible, then I may do that instead of getting a new head. Unless the head is cracked of course :x