Thanks Rich, that clears up a lot. I was wondering just how much vacuum monstrosity I had to keep. My 82 SD is a lot simpler.
My banjo bolt was clean. I think it had come off before given the mended hard line I found on it. I pulled a vacuum on it with my mityvac just to see if it was sludges up inside the manifold and it appeared clear. I will poke around in there with a wire to make sure the intake side is actually clear. The fact that I see a tiny amount of vacuum there (instead of boost) when I rev the engine may mean it is clear. I tested my gauge by blowing some air in it. It works well. There is just nothing coming out of that banjo bolt.
I’m thinking that my exhaust system may be so plugged up my turbo may not be spooling up. It spins at idle but perhaps it isn’t getting any significan rpm to develop boost. I really have know way of knowing how fast it is spinning.
What we are coming to is turbo removal and pass through pipe installation. Somehow I got diverted there while trying to get my vacuum locks to work. The good news is they work. Something tells me the swap is going to yield some fantastic results.
I’m going to undo the bolts on the ARV to see what makes it tick. I’ll check to see if I’m losing pressure here. Perhaps another trip to LKQ can net a new cold side housing.