Permanent Auxillary Fuel Tank

Has any one put an aux tank in the bed? I used the search, and there's a lot of info on swapping tanks with the Australian tank, info on adding a spare tire tank, and putting some jerry cans in the bed.

I'm just looking for a drag tank and using a transfer pump to move fuel. I have found a ton of 50 gallon and larger tanks, and that's just too much. I am looking for something around 30ish gallons. I also have a crossbed toolbox.

One of my concerns is venting. I use this truck as a work truck, and out here in NM and west TX, it gets really dusty. I am concerned about venting a tank and getting a bunch of dust and dirt in the tank.

What are my best options??

 

Bump.

 

check out titan tanks, http://titanfueltanks.com/

Heard good things don't know anybody that has one personally but am thinking of getting an aux tank for my tow rig at some point.