I personally did not want the 44 Gallon tank because of how far it sticks down in the back. This solution works for many individuals and is a matter of personal preference.
I was contemplating the 24 Gallon tank. I liked the way it sat and having 24 gallons additional fuel would have been real nice.
My main reason for getting the tank relates to when I tow my camper. Towing I get about 9MPG. When nakman (Tim Nakari) and I went to Flat Nasty in Mo., we would have to stop about 175 miles so we would not miss a gas station going across Kansas. Didn't want to get too low between gas stations. The effective range being 225miles. Adding the sub tank increases the effective range to 351 miles when towing. When I am not towing, my effective highway range is 375 and the sub tank would increase this to 585 miles. I decided that this increase in range would work for me. I could drive all the way to Moab without having to refuel when towing.
In other words, I decided that either the 13 gallon or 24 gallon tank would work.
The next area is cost. The 24 gallon tank would have been about $1100 and probably a bit more for other components. SOR had a 13 gallon tank with out the transfer pump and wanted $900 plus shipping.
I spent some time searching on Australian eBay and found a tank and transfer pump set-up that would work for me. I paid $168 total to buy it and have it delivered to my door. Shipping was actually less for this tank from Australia then for one of the other tanks here in the states.
The seller was concerned about shipping to the states and wasn't sure he could. Ozcal helped me out here by providing information to the seller on Australian Seamail. The seller took the tank to the "postal" and confirmed that he could ship it to me via seamail as it just barely fit the largest acceptable dimension when packed. This is where the patience comes in. Seamail takes 60-80 days, although I got my tank in 59 from date of shipment.
Note: The bracket just below the tank is used to keep the spare tire in place. My spare is no longer under the truck, so I did not use it
The next item I needed was a Dual Filler Neck. I bought it from a fellow mudder who was switching to a diesel style neck that didn't have the restrictor. The restrictor is the little plate that won't allow you to put leaded fuel in the tank.
Note: The vent tubes on the above neck have been cut short and are usually much longer. I easily fixed this with longer hoses
Next, a call to cdan for some misc parts (hoses, clamps) and some Rivnuts. Order George's ECU, Bought a sub tank switch from Slee (he is now out - can get them from an Australian Toyota Dealer), wire and some odds and ends from napa.
All together, my setup cost me about $420