Tell me about your extra tank. Is it a Toyota brand? I would love to get one, since I plan on driving my Land Cruiser around the world to bring world peace.
I think the tank (25 gallons) was imported by MAF from OZ. It has a fuel cutoff/switch mounted on the standard fuel filler, which fits neatly inside the door. There is a "AUX Fuel" switch (lighted) on the dash. The fuel gauge does not show fuel level when this is switched on, but the low fuel light comes on when the tank is low, and the aux is switched on. Total fuel capacity is 50 gallons. Costs a frickin' fortune to fill it up, but the same as two regular fills
Required relocating the spare to the rear (Kaymar swing away mount). This is a really nice mod, and allowed me to drive from Seattle to NorCal on a single tank of gas.
M
PS: When the weather clears a bit, I will get some pictures and post of the rig.