Whatever preload specification you choose to use, the position of the cam lobe when you're adjusting is important. A "running" adjustment is an absolute waste of time, no matter what all the purveyors of urban legends say. There's an adjustment procedure known as "companion cylinder valve adjustment" where the movement of the rocker arms on one cylinder is used to be sure the one halfway around the firing order has both valves fully closed. It works on either solid or hydraulic lifters. Try an archive search- - - -I've outlined the procedure many times over the past several years.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!