A: In short, "no vacuum at all" would be better.
Do you still have the instructions for your carburetor, or could you go online and get some information about your carburetor?
There should be information about where the Ported-Vacuum port is located on that carb.
If it were a Holley, you could use their website, but it's not.
On my '71 Charger, I don't use Vacuum-Advance (mechanism removed) but my Charger isn't a daily-driver and fuel-economy is not an issue.
In any event, for it to function properly, you need a "ported-vacuum" source.
You might want to check this recent post out if you can spare the time:
This is a Good Moparts Post for you to Review 
