I know not an fg, but this seems more like a 'poke' thread to me. im still waiting on my 25mm hubcentrics from the U S of obama. cant wait to add em to my 8.5/ 9.5" hiro's..
will all fit ok, as a common swap is an fg short straight into a ba/f. not sure about the specs/ valve sizes etc on the head between f and b series though