T-connection for Valve cover and crank case hose to balance tube?

[BluDestiny]

Hello, I'm trying to install a catch can on my 240z with an L28 with SU carbs with individual carb filters. 

 

Right now, the crank case vent runs to the balance tube through a PCV valve just like oem. No issue there. The valve cover however has one of those tiny filters, since the stock airbox for the carbs is gone. 

 

My understanding of the system is that the crankcase is used to draw air out through vacuum through the intake. The valve cover is designed to draw in fresh air at idle to the engine, but under WOT would not be pulling air. 

 

I want to run a single catch can to tie together the crank and valve cover hoses together, and run the outlet of my catch can back to the PCV on the balance tube. I'm wondering if that's correct, or if I have to run the valve cover vent separately to a location in front of the carbs to pull fresh air or if I can connect it without a PCV to the intake.

 

I found this picture on here, but the outlet going to intake does not indicate the PCV valve. which is what has me questioning my idea. 

 

[BluDestiny]

After reading the Arrington CCV Bible it looks like I actually want a dual catch can setup, with both the crank and valve cover returning through a filters catch can to the intake plenum, or somewhere before the throttle plate. 

 

This eliminates foul air modes at WOT and in either direction will still function. The PCV valve itself can be a choke point specifically at WOT due to increased blow by. 

 

 

The difficult part is that I have dual SU carbs that have no "plenum" and are essentially open to atmospheric.