Most of this weight will be on the rear. Have you weighed it? what's the rear axle number?
So far he has ignored us with that question or he doesn't understand how serious it is to over load Fords 9.75" semi float rear axle with just one small bearing at the end of the axle...... or any semi float rear axle.
Ford rates the '13 9.75" axle at 3850/4050/4800 lbs depending on springs/tires and wheel selections. I've yet to find the axle mfg rated capacity for the semi floater. Exceeding that number isn't a wise choice in the long run.