adjusting valves/ stud mount?? PKRWUD? Anyone??

Hey guys. I have a rebuilt 306 with the mods in my sig. I have the Edel. alum. heads #6025 w/ 2.02/1.60 valves and stud mounted rockers. A rocker arm on my driver's side of the motor is beginning to make some noise. It sounds a little loose...like it's coming off of the pushrod maybe. I've listened to the noise from every possible angle with a mechanics stethoscope. My Dad has as well...and he's a veteran hot rodder from back in the day that knows his stuff. He agrees with me that it is not a collapsed lifter or anything, and that I probably just need to readjust my valves. The rocker noise gets louder once the motor warms up. I'm going to rip the upper manifold & valve covers off in the next week or two and try to conquer this valve adjusting task. I've been doing a little research on another message board and thought I'd share the results with you. They linked me to some Crane rocker arm installation instructions and said to start with step-4. Here is the link. Scroll down to the bottom and read STEP-4.
http://64.90.9.168/cranecams/pdf/425e.pdf

What I'm wondering is if there is an exact way to do the proper adjusting? It just seems strange to me that Crane would recommend turning the motor over until the intake valve is 2/3rds of the way closed, in order to tighten the exhaust valve? Does that sound right? Is adjusting the valves on stud mounted rockers pretty easy when using hydraulic lifters? Once they pump up do they just make up any minute amount of play or anything in the valve train? Because Crane also says once you've tightened the valve down to zero lash that you "turn the nut down 1/2 to 1 turn", and then tighten the set screw while holding the hex nut. So how do you know if you should turn it just a half of a turn or a full turn? Any of you gearheads do this stuff for a living? Any pointers you can give me? PKRWUD? Sorry this is so long...I can get a bit overdescriptive at times. Thanks in advance guys.