It's a good thing your machinist is a machinest because he knows nothing about the valve train on these engines. They are hydraulic and require no adjustment. Don't worry, you will have plenty of other details to keep your mind occupied.
There was a comment about oiling the threads because of the stretch bolts. ALL head bolt holes should be cleaned, preferrably with a tap and the threads oiled whether they are stretch or not. It's the only way you can get an accurate torque.