Your post doesn’t make sense. Are you saying that when you place it in gear with the advance hooked up, it dies?

First of all, have you set the timing with a light to about 12 degrees advance with the vacuum disconnected?
Secondly, try sucking on the vacuum advance hose with your mouth, does the idle bump up? Or, when you hook it to vacuum, does the idle bump up? If you can suck on the hose leading to the advance and if the vacuum does not stay on, your vacuum pod has a leak.