Manifold Vacuum Experiment

RRR,
have you been for a test drive yet? Engine run cooler at idle?
I have not. We had tons to do in town today and not in the truck so I ran out of time. We'll drive it tomorrow and see what's up. And as in your post regarding bad chamber, low compression, no quench and big cam. That's a big "yeah" to all four. LOL So that's very likely why it wants so much. I have it at 30 right now, but I'll keep messin with it.