FORD F-150 AXLE RATIO CHOICE

I have also been looking at the towing options for the 2021 F150 and have in the past gotten the Max Tow Package because it included all the items one wants for towing at a price less than if each item were optioned separately but this year it appears to include 20" wheels and I don't want 20" wheels. Have had the 3.55 gear ratios with my 2014 3.5 Ecoboost and also with the 2017 Ecoboost and definately will get the 3.55 again. My brother and I each had identical 2014 F150's except he had the 3.31 gearing and I had the 3.55, I consistently got better everyday gas mileage (I know that the driver has more to do with gas mileage than maybe the gear ratio does but am just relating my experience). Hopefully I am wrong about the 20" wheels but on Ford's Build and Price website that's what comes up. The Max Tow Package includes the 3.55 gearing as I recall. And for me the 36 gallon gas tank was absolutely essential as you will be getting 10 mpg or less.