[aerohead]

I previewed the paper.
The thought crossed my mind that, as the airdam descends close enough to the ground that the frontal begins to increase beyond the original OEM value, that from that point, all Cds need to adjusted to agree with each new frontal area-based CdA.
Also, the F-150 is a body-on-frame, ventilated body-to-box configuration, and phenomena associated with it would be limited to ventilated bodies, leaving unibody pickups like Ridgeline, Cybertruck, Rivian, etc. in a different category.
The bed length isn't specified.
The fuel tank size isn't specified.
Standard cab vs Supercab.
There could be some variability in F-150 underbody aero performance depending on specifics.
Under full load, on unimproved ranch and farm surfaces, I'm uncertain how much suspension travel might occur during impacts, and if a 5-inch ground clearance airdam ( the lowest drag for the moving ground tunnel ) might experience a ground strike.
Do they actually publish a Cd for the truck?
The 2014, EcoBoost, 6.5-foot bed, 4WD, Supercab was Cd 0.402 and 36-sq-ft Af.
It looks like the F-150 constitutes 20% of Windshear's nozzle area. ( that's at zero yaw. I have no idea how large its aerodynamic footprint is at 7-degrees yaw ).