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The vent path on banjo-less rocker is through push rod tunnels , through push rod tunnel drains , through cam cavity , through cam cavity drain hole , through timing side , and finally back to crankcase and out the breather .  I am just reminding folks to be sure they still have a vent for their oil tank.  There may be enough venting  for the oil tank with the one way check valve in , But I am not certain of that.  I suppose that can be tested for to make sure oil comes out freely and goes back in freely at all operation conditions - high speeds etc.