Sounds like the PVC Valve is working like its exactly intended to do

It should bee sucking your finger like mentioned at idle - And the hose was dry inside

And you said you have baffles in the valve cover under the PVC Valve

I mentioned the Intake Flanges on 9-01 possibly hitting the hold down bars with that intake manifold

And with you finding all that oil inside the intake ports , i would say with confidence you found your problem

Now that you cleaned up / grinding the flashing on your intake manifold corners next to the hold down bars and confirmed that is was sitting flush with the tin valley pan

I would put it together and run it