I have to disagree with the 5.4L having no guts. My 05 FX4 pulls my car hauler with no problem. I do perfer to use my F350 powerstroke more for pulling but I have never been disapointed by the 5.4L. If your not worried about fuel milage then buy it, but I rather spend more on the truck then giving it all to the gas company. It might be a good idea if the seller will let you try it out with the travel trailer, but good luck with that one. But for the price your paying for that truck I could get a 98 to 00 powerstroke with around 220K where I live. It also depends on how far you plan on going. A few hrs away then maybe it would be a good truck, but more then 300 miles one-way I wouldn't go with gas. You really not going to get the answer your looking for. You could get hundreds of opinions. Good luck.