[Karl Bebout]

If the gas cap is any indication that the tank is vertically mounted directly below, filling is SO much easier and faster than the elongated "S" inlet on most 427SC body styles. You can see right down into the tank while you are filling it, get it 99%+ full with no slosh back and spillage. I've seen lots of guys with the other style have to "milk" theirs to get it full.
my 2¢ worth.