Ditto- - - -that line provides the air that the PCV sucks out of the crankcase- - - -PLUS all that nasty water vapor that makes the milky sludge in the valve cover. Look at the line ahead of the carburetor in that same picture that crosses the valve cover and attaches to the intake manifold. The PCV valve is on the other end of that line, attached to the standpipe from the road draft tube hole in the block.

PCV:

POSITIVE
CRANKCASE
VENTILATION

Air goes in, air and blow-by, plus any other vapors in the system come out. Why is this process so difficult to understand?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!