Manifold Vacuum Experiment

So here's where I am this morning. I turned the vacuum canister adjustment all the way CW. Busted old Gladys off and let her get some heat in her. Got the timing light back out and made sure of my initial findings yesterday. Wasn't quite 44 degrees initial, but 40. About 44 is where it makes a pretty hard stop idling up, so I backed it off a few and we're at 40 initial. That of course is with the vacuum canister hooked to manifold vacuum. I unhooked and plugged the vacuum hose going to the canister and reread the timing and it's right on top of 20 degrees initial, which is where I had it set before using ported vacuum, so we're right in the ballpark. It does seem to idle cleaner with the extra 20 degrees pulled in by the vacuum advance. We'll drive it later on and I'll report back.