Stock Hydraulic Lifter Preload Spec?

Thanks guys. I've typically run half to 3/4 turn on my junk with adjustable rockers, which translates to about .025". Since my dad wants to stick with non-adjustable rockers, we'll shoot for around .050-.060. The guy a federal mogul said their lifters have around .120" plunger range, so it's a pretty big window. The good thing is the machinist got all the valves within .005" on height. I appreciate the input.