Having put down my hogwash in writing, I have to say the systems of the 50's, 60's and early 70's are nowhere close to today's modern crankcase ventilation. The biggest advantage of the old PCV system is to blunt the hot burning oil smell from wafting through the firewall and stinking up the cab BUT the is the nuance or general experience of owning and old Stovebolt.
The PCV did greatly reduce the oil smell in my cab. Thankfully, I still get the full old truck experience with the aroma of the thick layer of gear oil simmering on the transmission.
