Be careful which F150 supercrew cab 3.5 EB engine you pick.
You want a F150 super crew with these GVWR/RAWR packages;
7050 GVWR...4050 RAWR...3.5 EB...1800-2000 bed payload.
7600 GVWR...4550 RAWR...5.0...2000-2200 bed payload.
7850HD GVWR...4800 RAWR...3.5 EB or 5.0...2400-2500 bed payload.
Ford markets the F150 super crew 3.5 EB 6750/6900/7000 GVWR but have those small 3800 RAWR = around 1400-1500 lbs (or less) in the bed before exceeding axle and tire capacities.
Choose the models with a 4050/4550/4800 RAWR for the most actual in the bed payloads.