If your running high boost (20+) you would want to weld on some larger AN -8 bungs on the valve cover running them into a catch can that has a vacuum signal.
If low boost you can leave it stock, or at least run the non-PVC to a catch can.
I much prefer -10 or -12 an lines for the vents. Venting is something that has come a long way the last few years.
I know of a lot of cars running 2x -12 from the valve cover and another 2x -12 or -10 from the oil pan yet they still don't have enough venting and still get pressure build up in the crankcase under boost.
Also, on a turbo setup there is no such thing as having vacuum while in boost so you want the catch can vented with a filter so as to make sure you don't trap the gases or worse yet send boost into the crankcase.
You could send the vent back to before the turbo but this will cause oil build up inside the turbo/intercooler and reduce performance (think opposite of meth injection, it will make you more knock prone). It will also still not have any vacuum unless your filter is too restrictive. I prefer to just vent it.
Y was thinkin -10an. And running 2 vents. Finally got my motor apart. Just wanna get the little stuff ready so when I put it back together it's done. Looking for 500whp
If u look in the engine bay pic the rear is from the top the the front is off the side
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