Slant 6 pcv valve rattling issue

Idle the engine up a tad, or down a tad, or try changing the idle-timing.
The noise is saying that the vacuum applied is about equal to the spring pressure So it's bouncing around. The above methods will alter the vacuum applied, maybe enough to shut her up.The slanty only has three cylinders pulling per revolution, so perhaps it's a bit more sensitive to a mis-calibrated valve.
I have heard an read so much about the vast errors in calibration that I too sorta subscribe to the "if it fits, make it work strategy." I mean it seems only one in 8 OEM valves may be correctly calibrated, and jobber stuff is just rehashed junk, perhaps copied after wrongly calibrated in the first place parts, that you are lucky if one in a hundred is right. So........What's a guy to do? There is no way I'm gonna buy a hundred valves to maybe get one that works the way the engineers intended it too. Or what if I buy 8 oems and the correct one is not in there? Do I buy 8 more? Is there even a way to know what the original calibration was? And if I knew, would I then build a rig to test all these valves?
I have been using used valves for decades. I'm happy when they rattle. That tells me it's alive and well, and eager to be doing it's job. They're not like points, or alternator brushes, or spark plugs. Sure, they may be listed as part of a tune-up, but Shoot, I have valves nearly as old as Methuselah that seem to be working just fine.
Now, if the noise bothers you, that's a nuther story.Cigarette smoke bothers me. I don't go anywhere where it is. I keep far away from it.There is no argument against what someone likes or doesn't.Or what bothers them.Women spend vast sums of money on personal body enhancements, as if..... OOPs wrong forum,lol