You cannot get any 5.0 with the max tow package, only ecoboost and 6.2. With that said, the only real differance if you have a truck with the trailer brake controller is the springs in the rear, and obviously the mirrors and engine. The rearend, trans, radiator and coolers, brakes etc are all the same.
2011 f150 5.0 screw fx4
1986 Mustang 377w 9.67 @ 141mph on 1 kit, yeah it's on the jugg
1994 Cobra 302, stock with some bolt ons, oh and a Vortech! 554 rwhp 492 rwtq on 91 pump swill...just a street car