Thats opposite to me, I got no leaks but very little oil gets up there!...KBG, I have an old pre unit and have plenty of oil in the top end
the problem with the old ones is with the leaks; imposible to stop them, normally on external oil pipes.
The crank breather on a '67 should be through the intake cam, and out of a tube "spike", facing toward the ground, in front of the countershaft sprocket.New owner of a 67 Bonneville. My mind is boggled at all this breather talk and opinions and improvements! I don't actually see a crankcase breather on my new purchase. Can someone tell me where it would originate on a '67?