I run a PCV valve on my engines, BUT I run a large (-16AN ) hose from the other cover to a Moroso Air/
Oil Separator (Stef's is similar), and then uphill to the aircleaner base.
The PCV valve engine intake manifold vacuum draws fresh air into the crankcase at part throttle through the large hose. Under load, the airflow reverses, since the crankcase blowby increases, and PCV flow decreases due to lower manifold vacuum.
At wide open throttle, PCV flow is near zero, crankcase blowby is higher than part throttle, and flows out via the large hose towards the aircleaner. I don't get any
oil mist on the valve covers, and no leaks from the rearmain seal etc.