I am currently replacing the engine in my van. It is an 84, I bought an 89 for the IDI, and later added a remote turbo. The replacement is a rebuilt later turbo engine.

What are the current thoughts on crank case ventilation? When I added the turbo I turned the CDR around and provided ways to vent it either in front of the turbo intake, the tail pipe, or the air. When I saw how much liquid oil was coming out I added a Mann separator after the CDR. I also tried the Mann without the CDR.

Might there be less oil flying around to be sucked into the vent if I vented off one or maybe both valve covers

And, is the CDR useless because there would never be enough vacuum from any of the possible dump points to close the valve?