- Adjust the exhaust valve with the intake valve half way to full open.

- adjust the intake valve with the exhaust valve half way to closing.

-- that ensures that the lifter you are adjusting is on the base circle.

- In the olden days, you could find zero lash by tightening the nut until you could not spin the push rod with your fingers. With modern materials, that usually puts you past zero lash, and the valve will not close all the way. Instead, tighten the nut by hand. When you can't tighten it any more with your fingers, that's zero lash.

- Turn the nut 1/2 turn past zero lash.

http://www.compcams.com/Technical/In.../Files/250.pdf