Manifold Vacuum Advance what am I not getting?

Do you know when an engine runs good versus when one runs like crap? If you don't, we have no business trying to help you. That's like saying you don't know what a woman is.
Rusty, I’ve provided a clip of how this engine is running. It’s not all that different from 24° to 42°. But I would say it’s better at 42° because the vacuum is higher and it runs smoother when you have a higher advance at idle. I thought that was typical for most engines.