273 rocker arm adjustment

Rockers:

braze shut the top rocker hole, ok, what brazing material/method have you found works best? Also with the top hole plugged, how does the top of valve and tip of rocker get oil?

I found a 7/64 drill bit fits (little under .100") fits nicely in the two holes for the valve lash adjuster threaded bore (the 2 holes on the left), so using those two holes as a guide, drill through to the other side of the rocker on the right? Then drill tap and plug the most outer hole on the left of the valve lash adjuster threaded bore? that makes sense to me because it will help keep oil going to the top cup of the push rod which is my problem area.

Rocker pivot shafts:
uhhhhhhhhhhhh oh boy im going in circles here, how do i drill when im on the base circle of the cam?

the shafts pictured have two holes, am i going to end up with two holes?

I should have a hole with banana grooves right where the galling is happening.?

the rocker arm pictured, has 4 holes and the shaft has two holes

sorry guys...i feel like a retard ...i may need some more step by step instructions with pictures...