I made my own system. Have the Branda twist valve covers, so bought two small twist caps and fitted 90 deg fittings to the center of each. I run a hose from those to a "T" fitting and from there to a PCV screwed into the intake manifold. I use a tall block vent on the hole at the rear of the manifold.
Before I did this, I would get a build-up of yellow glop under the valve cover caps. Moisture and additives from the
oil I think. It wold even back up out of the vent. No more probalems now.
ps: don't get the Branda 428 cast covers if your car has side emblems that say 427. You'll get tired of answering questions. I have the 428 covers and I'm going to change to the ones that say "Cobra LeMans"