F-250 4x4 crew cab question

[hobo2]

I settle on an open range 319RLS Thursday. I'm pulling it with a 2015 F-250 super duty 4x4 Crew cab 6.2 V8. The trailer tongue weight is 1240LBS. My question is there room for a 40 gal. gas tank against the cab and still be within the weight guide lines.
Charlie

[wingnut60]

Don't have enough weight figures/ratings to say for sure. 40 gal gas will weigh about 260lbs + the tank. Also, you will be limited to brands of tanks if you want to be DOT legal to carry gasoline--Transferflow advertises DOT gas tanks, I believe.
Doesn't your truck already have a 36gal tank?
Joe

[hobo2]

it has a 28gal the 16 has a 36

[wingnut60]

Sorry, thought they began the larger gas tanks in '15. You might consider the cost of putting the newer tank on your truck.
Still need the rear axle rating/actual weight on your truck as it sits to figure how much wiggle room you have left. A WD hitch is going to be mandatory, and a good one at that.
Joe