Vacuum advance tuning to maximize cruise MPG?

AJ/FormS said
md
Are you saying that your current can has 22* in it? Is that before modding? Me want,one! There should be a number on the arm; any idea what it is. Whats it out of? Im so jealous.

All my #s crank degrees. Can is marked 11 for dizzy degrees, but I'm really only getting 9 from it. I'm going to grind the stop down today.