He isn’t looking for 30mpg’s and run low 11’s. What he is looking for is max efficiency with what he has and any tricks that gain mileage. Which IMO means low rpm torque, low fuel consumption at cruise rpm and that would also include efficient ignition for complete mixture burn.
Concentration on these aspects will or should provide best fuel economy for what he has. Granted! Your not going to get 20mpg’s with the equipment needed for 11’s on a N/A engine but wasting the fuel is just simply that.
If your street strip mill runs 11’s, great! Now when you cruise around town, would you rather get 5 mpg’s or 11? This is his hunt. Maximize what he has in mileage and E.T. I enjoy doing just this. And I do realize it is what it is and it will be what it will be. And so does the thread starter.