Hi Folks,
     A question for you Lycoming wizzards;  My O-320 has two styles of
rocker arms (4 each).  One has a lubrication hole drilled in a raised
"boss"on the casting more on the pushrod side of the rocker.  The other has
the same raised boss on the casting but no hole.  The latter have a small
hole closer to the valve side of the rocker.  I assume one is for intake,
the other exaust...right?  Anyone know which is which?
      regards
           Rich Kindig