72 Dart 360 PVC valve issues

[1] I told you in post #22 that the engine is worn. If it is THAT worn that the you are getting oil in the spark plug,
then the only fix........is to strip the engine & fix it properly.
[2] A worn engine can carbon up the PCV such that it no longer rattles. A 'rattle' test is not conclusive for an engine like this. It has gone beyond testing PCVs....