Improve the baffle plate and lift or position the PCV higher above any baffle plate. This may mean getting someone to lathe up a sleeve type extension to enable this. If the PCV is too close to the baffle plate it will simply pull the
oil off it, have 'cured' several mustangs etc with 'el cheapo' rocker covers/baffle plates. About 1/2" upward is usually all it takes.