Are PCV needed?

Need some advice, I just got my 69 Dart on the road and have discovered oil saturating the Summit Breather on the right valve cover located to the back of the valve cover. Have oil running down onto the headers. Valve covers are the Mopar Performance ones. I cleaned the breather and have relocated it to the driver side valve cover which puts the breather towards the front of the valve cover. The cloud of smoke has stopped on acceleration but is this the solution. The other valve cover I've been using the typical 1/4 turn cap.
Question, should I be using a PCV valve on the right side in addition to the breather on the driver side or use a PCV and cap the other side? Seems like the passenger side gets oil slush toward the back of the valve cover or maybe a push rod points right at the hole in the valve cover allowing oil to be squirted into the breather???