Engine Side cover "thing"

[CShort]

I'm wondering what this thing is on the side cover of a 4-134 engine installed in my '62 CJ5 . Simply there. Not shown in the service manual, that I could find.

 

[CShort]

Thanks. Was able to answer my own question. Part of the PCV system, although I don't think a '62 would have one. Probably a later engine.

 

[73AMC360]

My 52 L head has the same fitting. I don't know how far back it goes.