In 1958 I am almost positive the oil to the rockers went thru a head bolt in one positon near the outside of the head. I remember this bolt was drilled thru the center and seems it had a hole in the side of that drilled passage.It was also notorius for stopping up and shutting off the oil flow. We used to grind a groove in the side of the bolt to let oil pass up beside that headbolt! It was often bypassed by all sorts of contraptions. Not many people knew how the oil was supposed to get to the rockers! I would look long and hard at all my head bolts.
