My motor was built by Keith Craft and he isn't a big fan of PVC systems. It has a breather at the rear of the intake and the breather/
oil fill cap at the front. The traditional S-shaped breather for the rear interfered with the heater hoses on mine so Barry R fabed up a breather (like off of a valve cover) and aluminum mount and it's installed there, down low. It just barely clears the bottom of the rear carb so it's kind of invisible. Come to think of it, it wasn't installed yet on the photos I posted.
If you look closely you can catch a glimpse of the breather under the rear carb in this clip.