It's pretty simple. This is how I've done mine on my rotated GTX35R set up.
Subjective but this has worked for me for almost 20 years.
Inlets to Can
T the heads and run into the can.
Run a separate feed from Crankcase to can.
Outlets from Can
On top of the Catch can you have a vent to atmosphere breather. I normally run a hose from this and vent under the passenger side near the gearbox. If you wan't to keep compliant with regs then vent it back to your intake pipe although I just vent to atmosphere.
I return the contents of the catch can to the sump. Again subjective and lots of misinformation surrounding this. Yes the return will have some moisture in but more importantly it has oil which stays in your engine. Any moisture will evaporate with the heat anyway.
When I built my car I designed my own return to sump catch can and it's been faultless.
