Location for oil holes on rocker arms?

If I was going to drill a hole it wouldn’t be on top. It would be under the rocker blowing oil right onto the spring.

I can tell you tomorrow what hole size PRW uses.

EDIT: I’m not sure that hole is all that important.

Looks like they may have listened to you. I took off the rockers to see if they may have routed the holes as in Rockets picture. Upon removing the rocker I found a hole drilled on the bottom (pictured below). It is fairly small, but I took a can of WD40 with the red tube attached and was able to see fluid pass through it. I will confirm with PRW that spraying the spring is the intent, but I can't imaging it being for anything else.

Bottom hole.jpg