My opinion...
1. You don't need no stinkin pcv.
2. You do need breathers.
3. You assolutely need baffles/splash plates in the valve covers under the holes where the breathers go.
482 Shelby/big cam motor...I have K&N breathers on each valve cover (with splash plates under the holes), and I have the screen mesh/tube to the original-style
oil separator/"puke tank" on the firewall, which then has a "road draft tube" to dump all the crap into the air so it smudges the he!! out of the front of any Prius morons behind me.
Works muy goodo right up to 7,000 or so, at which point I start having anal leakage anyway.