I just had the head resurfaced and the valves ground and now I am trying to set the clearance. On the exhaust side I cannot get any and I mean any clearance. I have used the same shims that I took out so I think I should have some clearance as I do on all the other valves. Do I have the machine shop grind the top of the valves or how do I get some kind of clearance so I know what size shims to use? Really need help cause I want to get it together soon. Thanks!!