Check these out.

[Boomer II]

http://www.tourbuddy.com/dodgetruck.shtml

 

[Turbo Horseman]

 

[Mtngoat]

Have been thinking about extended fuel, but my truck can outlast my bladder the way it is!! So have to stop anyway. Seriously, the extra fuel would be nice so you can pick and choose where to buy fuel.



Robin

 

[Paychk]

If you read the fine print there aren't legal for sale in the US. They are gravity feed tanks and that is a violation of DOT regs. I personally think it is a great idea. If you installed a solenoid valve wired into the ignition switch, so the fuel was shut off when it wasn't running, I would think it would be safe.