I started this post, but here is another twist.
I just discovered that the motor has a a grommet on the filter side valve cover that has a built in baffle (molded rubber) that shields the opening into the valve cover. The PCV side (passenger valve cover) grommet is just a donut rubber ring with the hole clear to the rockers that must allow this thing to really suck
oil vapors and droplets out of the cover like crazy.
That has to be backward as far a the grommets go.
Doesn't really seem like a very good baffle anyway.