It's all about what your comfy with,with a TC on the truck.I hauled a Lance Sqire 8.6 on my Ford F-250 with the only mod being Helwig helper springs..It traveled really good,as good as my Lance 9.6 on my Ford F-350 DRW..That's my point..
I have all but the exact truck camper as the Lance 915...Sticker says 2582 or something similar..Loaded to the hilt it is weighing in at 37-3800 pounds ready for the hills.
I can tell it's on my DRW and I have the rear sway bar and air bags..Would my F-250 haul it as well..No way,but it would haul it with the extra sway that would come with it.
So I am just saying,it is all about what your comfy driving..Yes,your F-250 will haul that 915 but you will have some sway just like most TC's give..