A new update

1. Vacuum guage reads 18" in park, and 14" in drive
2. Drive idle was still surging.
3. Vacuum advance begins at about 12-12.5

Questions

1.Which way to would I turn the vacuum advance adjustment to make it unload at a lower vacuum?
2.What is a normal amount of vacuum when the diaphram begins to unload.
3. What is normal vacuu, for when the diaphram is done unloading?
4. what is normal vacuum while in gear?

Thanks in advanced,
Guido II