Hey is the mess simply because of the way the valve fits the grommet or the grommet fits the valve.
I would think
oil and fumes should flow nicely under vacuum to the base of that intake.
Your vacuum is max at idle and slow cruise.......should pull then.
Shake the valve it should rattle.
Doesn't matter which side it sits on as long as it is from valve to intake or carb
The breathers are sometimes routed to the air breather inlet
Tim