Very simple. When one of the valves open to its peak, adjust the other valve on that cylinder. Zero lash, plus 1/2 turn. Repeat till you're done. BUT, be very careful that your lifters haven't blead down, or you may trick yourself, and mis-adjust one and keep the valve open. I usually don't even bother spinning the pushrods, I just tighten down the nut till there isn't any play in the rocker arm, and then add 1/2 turn. Its pretty self explanatory.