IMHO, I think you should have the PCV system functioning. One might think since it's not been working for a lot of miles then maybe you don't need it.
If we know what the PCV system is supposed to do you'd think differently. It uses a valve to remove blow by gases and other unwanted fumes from the engine crankcase.
Lets go back to what we had before, just in case not all of you remember. We used a draft tube. All that did was when moving a tube with a slanted cut off end was exposed to moving air causing a vacuum which sucked some of those gases out of the crank case. The PCV system greatly improved that and therefore the engine crank case and oil would usually stay much, much cleaner.
The PCV system as I understood and taught it did all good things. Besides keeping reducing the amount of oil sludge it also decreased the amount of engine pollutants. Early on the EGR and catalytic converters were thought by some to not be good additions to the pollution control systems and were often bypassed.
TeJay Auto Instructor/4-yrs USAF/ Liz: RN/ WBGO 2014 Vista 30T/ F-53/CHF/5-Star/Koni * Bella & Izzy * Golden /Cocker mix/ Louie The Cat* All Retired