Best possible mileage?

Wholey smokes! First trip out today after milling the head 0.100", replacing the Holley 1945 single barrel with a Carter BBD two-barrel carb (+modified single barrel intake) and tube headers. The 2:45 rear end is still there... I also did the AJ/FormS cruise timing, valve adj, thermostat mods. Stock MPG was 18-19. Today, with my foot in it a bit just because it runs sooo much better I got 30! HA! More low-end grunt, sounds great at 3500RPM AND a 50% increase in mileage.
:lol: