zero lash

I've searched and read for an easy way to adjust my valves to zero lash cold, but haven't found an easy way. If I bring it to tdc on the compression stroke and tighten them down where a .002 feeler gauge won't fit between the lash cap and rocker arm, the pushrod still has a lot of play up and down. Can I tighten them down and be good as long as I can spin the pushrod easy? Can anyone tell me an easy way? I've about ripped my arm off when it kicks back over and over from valves being too loose. I even pulled the flywheel off to make sure it hasn't slipped and it was good so I retorqued it to 70lbs. I'm about positive it is the valves. Any help will be much appreciated.