head bolt bulge in runner?

If the valves have ever been ground they might have a better valve job than the factory sent them out with. That'll make them flow better. You should be able to get them to 250 or real close. Maybe even better. I don't know how much experience you have but I don't have much and I got mine right flowing at 250. I've been told they can flow alot better than that if you know more what your doing. BJR has posted some tremendous numbers on the ones he does.

How were the low lift numbers? In specifically the .200-.400 area. That's where the valve spends most of it's time so that makes the most difference in how your engine runs.