I think I asked my question wrong.
For any fuel tank/cell mounted under the bed, behind the rear end, does anyone have details on how far back it should go? I am concerned about the fuel filler in particular. With the tank I bought, it is all the way to the back, close to the center. Should the tank hug up close to the rear end or put it as far back as possible?
The bed was not on the truck when I bought it and I'm guessing the 3600 I bought as an "assembled model" has different dimensions in the back?
I would like to weld in the brackets to hold the tank and I really don't want to mess this up.
Thanks for any and all help.