How many of you guys are running head breathers? I understand the premise to save the seals from excess pressure, but sometimes pressure is good, especially oil pressure. I was just wondering what type of oil system these 50s have and if the oil breather was a good or bad thing based on the oiling system in these things? I dont know if the oil pump picks up from the bottom of the case or through a pressurized passageway, any thoughts, comments? Anyone had problems after they switched to one?