In the sentence before it says you can run the stock tank in the stock location it says; <font color=green>Fuel cell's may be located anywhere and have any capacity</font color=green>. So I am kinda confused as to what is legal in Class 11
The stock tank is so high you don't need a skid plate under it. I'm building another 11 car and i've looked into this. So this time i'm leaving the stock tank in to hopefully distribute the weight a little better.