318 MAX fuel economy builds?

360? High mpg? Does not compute. Sorry.
273 explained it pretty good. Of course, the larger the engine the harder it is to get good mileage. But before I go…

What do you consider good mileage?
And what’s good mileage out of a 360?
In my case on my b body fury's 318 it will be getting a lean burn ectomy as it was starting to act goofy the last couple of years.
Getting rid of the Leanburn should have been the very first thing you did when you got the car. Bar none.
My thought was that the 360 with a 1.7 rts ratio rather than the 1.85 and 40 more cubes would move the air faster through the carb and ports at lower rpm which would help the non FI engine atomize the fuel.
Super small potato chip crumbs!