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W/O knowing exactly what you are doing this is the way I approached it. A breather box with a line from each valve cover boss then a fume cool off w/a solids recovery line to the oil fill tube. This can allow high revving pressure to be somewhat reduced as it isn't a "closed system" anymore.

An fittings are expensive and can be overkill but to each their own.

Lee

My opinion is worth something less than you paid for it .

My experience with blowby and a turbo is if you have massive blowby that shows up....it's is more than likely caused by cracked pistons from detonation and will be a ticking time bomb.
Just ask CorysVDub about it........I replaced my P/C's after over a year of fighting blowby and all the symptoms went away.

I now just use this single hose as a breather/dump hose.

Hey clonebug so no more valve cover breathers being used?

Nope......Just a 3/4 inch hose off the Mexican Alt stand going in an arc down to a road draft. I've had zero issues with blowby since replacing the P/C's and getting my detonation in check.
W/I , intercooler, retarded timing or all of them is a must for intake temps over 130 degrees I have found.

Anything over 6-8 lbs is the point you really need to upgrade to something that will cool the IAT's or really control your ignition retard which reduces power along with the higher IAT's.

Good to know:)