I think I might have an engine problem... :(
To prove the PV is making that mess, you can replace it with a plug and repeat the test.You can drive it and cruise it,with the plug in there, but you won't be able to use much throttle opening.
If you hook up a vacuum gauge,visible from the drivers seat,this will also allow you to fairly accurately determine the opening vacuum required for the PV, cuz when you roll into the throttle and the carb goes lean, you will feel it and be able to capture the vacuum requirement right there on the dial. Works great if you also have a PV tester, and plumb that same gauge to it.For this test, make sure the powertrain is fully warmed up and the timing has been finalized... and of course the PCV is functioning, the plugs are clean,etc.