Title says all - hoses from valve covers to top of catch can are 12an. Line from side of catch can is 3/8 “ to pcv and check. Hose from air filter to tb is 3/8 also. Ls1 valley cover if that matters. Edit: I’ve attempted numerous times to contact my catch catch manufacturer who was once very active on here but no longer is. So I’ve attempted my best to follow their install instructions in the paper that came with the can.

 

Too complicated.
I set mine up like this per Mighty Mouse's recommendation, 14 lbs. 700whp worked for years no issue.
The 3/8" side is only meant for PCV function under vacuum, under boost all the pressure is relieved on the -12AN side.
The 3/8" line off the pass cover went to a small filter tucked inside my inner fender or it could go to the turbo inlet if you want.
At 700hp this setup is overkill but you're covered for more power later on.

 

OP I see in your diagram a line from pass side VC to TB without a check valve, that's going to push boost into the VC. Will be a boost leak at best

 

I am testing a very simple crankcase venting system.
Gen3 5.3:
Passenger valve cover factory 3/8" pressed in nipple, 3/8 hose about 18inches long ends in a cheap Spectre 3/8 push on air filter, 8 dollar ebay special, loosely zip tied just below conical turbo air intake filter. ....So far, simplicity.

DRIVER side: rear rocker cover PCV grommet has 1/2" id x 6 foot Dayco Heater hose pushed in about 3/4" deep. fits snug, stays put, no adhesive required. Hose loops up about five inches, and then down around hydroboost, along frame rail, loosely ziptied around steel brakelines, last ziptie around ABS bracket, and OPEN END hangs down an inch below torsion bar. very occasional drip of condensed steam.... .. . . . Again, stone age simple: Open Hose, six feet long.
Presume it blows a pretty good bit of blowby gas at 193kPA, but I've not seen or smelled it. no oil drips.

Similar setup was factory stock on 1990s Diesel pickups, called a "Road Draft Tube" also used universally on automobiles before about 1964 or so.
.
. BEFORE my current setup, every time I pushed boost, I'd throw a heavy smoke screen, thought my brand new Turbo seals were shot, right out of the box. I am convinced that a standard CLOSED automotive PCV system is uncompatible with anything more than 5 or 6 PSI boost.

 

The MM PCV Can is different in that it really can support both functions.
The can has an internal check valve that draws air from the filter off my passenger side valve cover while under vacuum so you get nice clean air drawn through the engine.
Under boost the internal valve opens and the pressurized air is let out through the -12AN line in driver valve cover and out the filter in the top of can.
A little bit gets let out through the smaller filter but not enough to worry about.
I never got any oily residue off the smaller filter or the filter on the can.
It worked excellent for years until I sold the car.

 

good catch my man ! Thought never crossed my mind.
I spoke with the owner of the mm catch can and he recommended a seperate external catch from each valve cover. I took it a step further and run a can from each valve cover. So far works pretty good.

 

Good to hear 🍻