Northern Tool had a deal going on combo Fuel Tank /Tool Box. I was really thinking about getting one but when I started asking about installation no one knew anybody in the area that intalled them. The last time I had a truck with an extra tank was 25 years ago and I think it came that way.
Would the install be very difficult on a Super Duty? Towing up to the Midwest burns a good bit of diesel and an added 60 gallon tank will be a good thing to have.

Mac