I put it into gear and it dies.

I disagree. The PCV should be used for what it is. I don't think adding it to for a tuning aid is the right thing to do. It should be included to perform its specific purpose and be a part of the entire system and just tune accordingly with it in place. Same thing you're saying essentially, but yall are makin it sound like it's used as a band aid, when that's not the case. Millions of cars ran just fine without PCV valves before they were mandated.
Yea maybe I used the wrong wording when I said to add it as a tuning tool. But there is zero downside to using one and actually significant sealing benefits and maybe even a little power in the ring seal. The idle bypass air will definitely help the stalling while in gear problem. That’s really the point I was making. I do agree with @67Dart273 tjough I think we wandered a little off course.