NOt having the kit nor finding one online, the fuel tank does not protrude through the fire wall AT ALL. the only thing that goes through the fw is the fuel tube to the hispeed needle and the pressure tube to the muffler nipple. That's it.

Maybe if you could take a pic of the are you are concerned with. Is it actually getting the tank in the alloted space? Not quite sure what you mean but no part of the tank itself goes past the fw.