Right, about the PCV valve.
When the recall was done on my '88, maybe they were lazy. The intake tube was replaced, and the metal tube that runs from the front valve cover to the intake tube was installed, but the air cannister wasn't capped, and the metal tube against the firewall was not removed--or capped. I restored the cannister I had, capped that hole, and installed new gaskets. I capped, then later removed the tube against the firewall. My cannister was replaced with one that isn't as nice, but it doesn't have that hole. I have no idea what happened to that gasket, so I'll have to get another one.
In my '86 Fiero, someone cut a hole in the intake tube and duct-taped the metal tube from the valve cover into place.