I have a 2005 f150 5.4 with the tow pkg. Magnaflow exhaust, superchips tuner, and CAI. I have a 6" lift with 35" tires, I added a add a leaf to the rear and upgraded from 3:73 to 4:56 gears. I tow a coachman 292bhds. I was concerned a bit, but on our first trip I stopped at some cat scales and did the 3 weight measurements and found I was under all areas quite a bit. Don't remember the numbers off hand. It pulls it pretty good. I use a superchips tuner and use their tow mode and found it controls shift points better. You have to run 91+ octane fuel though. I will find out more when we head to florida dec 27 from michigan. Oh also I have 206,000 miles on it and still running strong.
Paul, Dawn, Brennan & Blake Kurek
2013 Coachman 292BHDS
2005 F150 Lariat SuperCrew 4x4
1 spoiled lab and 1 even more spoiled boxer