Oil or Gas on top of intake???

ZooKypr said

This is my PCV. Replaced once in last 5k miles. I used the original as reference for a replacement.
If wrong, which type / part# are you saying should be on my 273 Commando?

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I’m saying all those part numbers were collapsed years and years ago. The PCV valve was engineered for very specific applications. Over time, the manufacturers stopped producing application specific valves and made what could be called an “average” valve.

The best PCV valve out there is the M.E. Wagner PCV valve. You tune it for your application. A bit pricey but they actually work.