Quote Originally Posted by f4tal View Post

Thats my guess but supposedly you want a small amount of clearence for the oil to make it up and out of the PR thus providing lubrication. Plus With about .50 thousandths of play the PR moves so quickly that it causes the cam to become a solid roller at high RPM's. This is all hear say. Don't quote me
That first statement isn't a good rule to follow, there doesn't need to be a small amount of clearance for the push rod. Meaning you don't run a short push rod to allow oil to lubricate better, the push rod needs to ride against the rocker tip.

If Ur push rods have .050" of play between the rocker tip and push rod, then something's not right. Collapsed lifters or wrong pushrods.
Also, the tip of the rocker needs to correctly ride on the valve tip. Right in the center.