wonder if somebody could take a stock cat box, and useing those measurements, create me a safe fuel tank that would mount down there. not sure if the stock fuelpump would suck fuel up from it, or if you would need to just remove stock one, and install a line from stock tank down, and then install your fuel pump into the bottom tank, In theory the stock tank would drain into the lower tank as the fuel from lower tank was consumed, bet you could get a 2 gallon square fuel cell down there. would be able to seal it better with the stock tank drainign into it.
if done correctly would add some range between stops and would be completely transparent. ( painted black to match)
hmmmmm