Well it looks like they were a little generous with the demensions of my fuel cell, so in short its not gonna fit. I could put it directly behind the axle but that opens up an entirely new can of worms. First thats moving weight in the wrong direction. I want the bulk of mass inbetween the wheel centers for quick transitions. If I put it back there I would have to move my battery, which I just mounted, to the opposite side. And lastly the fuel cell would interfere with my swaybar mounting.
So Ill be using the stock tank, I just have to get the rust out of it.
and the start of my coolant tank - swirl pot.