Rocker shims = NO rocker shaft oiling

Wow! Lots of typing there ^^^
So I’ve tried preloading a hydraulic lifter to the bottom plunger depth like said above and ended up after a few pulls with a lifter tick. I Pulled the intake and found the retainer clips fell out of the lifters. In pieces but all were in bottom of pan.

I was told by the machine shop not to do that with certain lifters - comp cams for one - as they need the pressure of start up to expel air while pumping up and if too much slop- the clips fall out. These were wire type clips and not c clips. Has technology changed or did I mis read the above info?