Readily available now. I'm in the same boat and wanting to get a longer range tank.
Planning on an extended tank, turbo kit, etc :steer:
Cruiser Brothers LRA Post
Haha I was filling up with 1/2+ tanks a few times to be on the safe side and was doing a lot of detouring. Without the rooftop tent i was averaging 15-16mpg. With the RTT i was getting 10-14 depending on speed/passes/etc.
Chasing this issue too. I drove from seattle to san fran and back this last week. Twice i had gas overflow from the tank to make a sizeable (couple cups) puddle on the ground at the driver rear corner of the truck, but that was out of over 10 fill ups (til the pump clicked).
I'm thinking its...