I`m doing all by the FIA book and the safety article nº 153
the filler pipe passed the homologations like the fuel cell and with all the securytty antiroll valves ectr... and like FIA saed for inside tank it will have a pipe cover with other pipe but , it will be very well done ofcourse! and if I have an accident (dont like) which destroy the fuel tank .... for sure that i will be at the other side before it happens
my car is a LHD so yes the tank is behin me because on the other side I have the battery , allways I can put an screen to separate it form the copckit