Manifold Vacuum Advance what am I not getting?

It's a carburetor issue. 99%
I can agree with both of you. The converter is a drivability issue for sure. The carburetor I am sure could use more tuning. This is my first time working with a Holley. I only have worked with a few Rochesters in years past. So I am trying to figure out this as well. Lots to learn all at onceā€¦. Wish you guys could come over and just freaken show me. So I will keep trying to learn here and in books etc.