For anyone reading who has a hydraulic cam, I have a foolproof method of adjusting juice lifters. Use the sequence as suggested above by cook. To adjust the valves, back off of the rocker arm until you can spin the pushrod between your fingertips. Then slowly tighten the nut down until the pushrod stops rotating. Turn the nut EXACTLY one-eighth of a turn and your hydraulic lifter is set. Do not go 1/4-turn. I've found that with a performance or even stock cam, this sets the lifter preload perfectly. Hope this helps someone.
Lots of room for hydraulic installs....
Every BB hydraulic cam I put in I did the following:
Coat base with moly-lube and install lifters (Soak in oil over night but do not pre-pump prior to installing)
Rotate engine to get the lifter on the lobe bottom
Turn the rocker arm adjusting nut until the lifter plunger moves about 1/16" down from the plunger retainer
At this point you can fire up the motor and usually do not have to adjust them afterwards.