Free: Contests & Raffles.
I never had a side to side issue with my F350 as they have a full size box, but I did have to space the camper up the width of a 2x4. I ended up fastening them to the bottom of the camper. If I didn't use the spacer, the overhang of the camper would of crushed my clearance lights on top of the cab. Apparently the boxes on the older trucks were not as deep or the cab as high.
That's a first. Never heard of that before.
Aerodynamics.Every 1/10th of a mpg gain is a marketing tool.