Running adjustment of hydraulic lifters is not a good idea, since the lifter is getting slapped by the cam lobe several times a second. Warm the engine up for several minutes, then stop it and follow the firing order like adjusting solid lifters. From top dead center on the compression stroke, loosen the adjustment to allow the lifter to top out completely and tighten the adjusting screw anywhere from 3/4 to 2 turns, depending on whose advice you're following. One turn past the "zero clearance" point works well for me on stovebolt hydraulics. There's also a sneaky trick about putting a shallow groove in the ball end of the pushrod to allow trapped air in the lifter to escape that's outlined in a tech tip.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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