340 adjustable LOCKING rocker arm kit

w2 rock.jpg
Does it keep the cup and ball oiled?
.
That hole was just for access for the drill to get to the center of the rocker arm shaft in order to let oil flow into push rod.
That hole needs to be plugged anyway because it just lets oil exscape that would be used to lubricate the cup and the pushrod and the ball on the end of the adjuster.