If your going hyd. and want to stay with stock rockers, and your willing to put in the time considering the variance of the factory valvetrain, you can get your lifters done then match a lifter/rocker to each valve and measure them all for pushrod length then order the proper individual sizes for a .030/.040 preload. Surely many would be the same, but you'd have the option to get your adjustment just right.
Just spitballing here. :)