This is why if you remember,
@Oldmanmopar and his son came up with milling a flat on the head stud that goes into that particular hole where the oil feed is. They wanted to make SURE there was enough oil flow.....but got vilified for their idea. I thought it was a good one. The small amount they milled off would in no way have an effect on the stud's strength, yet all the forum experts showed up in full force to tell them how stupid their idea was. Yet, I JUST BET they don't have oiling problems to the rockers. Not saying that's your problem, but it's darn well worth double checking.