Wow.. that looks low... what is the capacity difference?
To be honest, I can't afford to fill it all the way up right now. So I don't know exactly how many gallons it holds. But as far as I know, it's a 38 gallon tank. And it works perfectly, all the way down to 1/16 of a tank, which is the lowest I've let it get down.
And the tank really doesn't sit as low as it looks. It's just above even with the rear differential. And if I ever get around to doing my 4x4 swap, then there wouldn't be any height problems at all.