Nah, hydraulic are easy to set.
It is this preloading that have me asking questions. I cant believe you want the lifter plunger in the middle. if you have cleaned out a lifter you know what im talking about.
All my past works of performance i used something like this for a gm inital startup adjustment. Just to get it close.
At TDC position Adjust intake valve on cyl Adjust exhaust vlave
1 2 8
8 1 4
4 8 3
3 4 6
6 3 5
5 6 7
7 5 2
2 7 1
This is just putting it together to start and break in. Then you adjust up with it running loosen till ticking then tighten to slowly till it goes away.
There was a nice lady involved and wanted it to not come back. The preload info does have me thinking.
You want it to wipe down the center and 90deg angularity. Adding .040" lift isnt going to change angularity much. Add .1" lift and start looking for pushrods.
Guides hole can be enlongated / chamfered?
Hittinng the retainer is a podiblilty and spring coil bind from lift. But rocker to spring is hard to come by.