This is strickly a guess but that tube may be a vacuum line going to the brake booster or vacuum reservoir. Unfortunately I am of no help on the PCV valve but I'm sure many others can be.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
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Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain