the 235 does have lubrication tim is right i am planning on doing a full-flow oil filter conversion. the reason im asking about the rocker arm oiler is one of the rocker arm shafts was wore badly i also think it was installed wrong the oil hols were at the bottom i think they should be at the top but i was just thinking maybe i could get more oil to the rockers by making the rocker oiler sealed to the head just a thought and give the rockers more oil i did not do any work on this engine when i got it was the way i mentioned