FORD 2002 F-150 v.3 - Manual (Page 227)

If you are towing a NASCAR Special Edition F-150 or a Harley-Davidson
F-150 using flatbed equipment, you must place two 4X4 boards at the
end of the ramp to allow for bumper clearance.
If the vehicle is towed by other means or incorrectly, vehicle
damage may occur.
Ford Motor Company produces a towing manual for all authorized tow
truck operators. Have your tow truck operator refer to this manual for
proper hook-up and towing procedures for your vehicle.
Roadside Emergencies
227