Rocker shims = NO rocker shaft oiling

Mojoe9955 said
Yes maybe I am. "Setting" the lifter preload with stock rocker arms doesn't seem to me to be possible as there is no adjustment.
Reading about how to accomplish this pretty much scrambled my mind as I'm a bit dyslexic. With that in mind let me start over.
Stock rocker shafts, and valves
I had the heads surfaced and 3 angle valve job.
New V258H12 cam/lifter kit.
New 901Comp springs and appropriate hardware.
I'm using a .028 head gasket thinking it will boost my compression up a bit.
Using this info and forgetting the shims, can I theoretically use my stock length push rods?

You did the right thing preload-wise, yes, You are setting the preload by shimming. You didn't say how much was taken off the head, so You could end up with exactly the same preload You started with, depending on the gasket You pulled.
There's also the element of stock rocker geometry that's being buried here, for that @B3RE could chime in, nobody knows more about this topic than this cat.