Manifold Vacuum Advance what am I not getting?

So far, all he's told us is what he "believes", not what he's "verified". I think I asked somewhere in this thread for compression test results. That would help greatly.
Compression numbers on the to do list here. Between spending time in a hospital bed and dealing with 120 shop temps I can’t do much quickly. But at least I am home again. I’ll post the compression numbers as soon as I can but it might be a few days more.