Valve Lash Adjustment
wazoo64,
There are many factors (ramps, lift, spring pressures, pofile...etc.) but it should not require constant attention. Sometimes a header leak can fake you out and sound like a lifter/rocker.
A couple of motors ago I found I was adjusting it all the time.. you can see by the picture what I found. Moral of the story is if you are adjusting them all the time you may have an issue brewing.
Kory