PCV valve placement C59A

[Will D]

Hi guys, I removed my intake to clean it up and add a pcv valve. My manifold has the oil filler tube on the front right side so I was going to remove it and add a blank plate with the pcv valve. Upon removing the intake I discovered a blank drillable spot at the rear left side of the manifold that would work perfectly and I could maintain the oil filler tube.

Based on existing and recommended setups, is it a bad idea to try and place the pcv valve at the rear of the manifold by the inlet. Will that negatively affect flow? Does the air inlet actually flow straight down to the crankcase so the air should flow fine whether the pcv is at the front or rear?

If a bad idea, any clue as to what that space might(white arrow) have been for?

Existing setup.



What seems to be the trend.



Can I do this?



Intake manifold in question.