[suffolk boy]

i fitted around six fbh heaters.i cannot recall there being a difference in the plugs on any off them.there are two types of heater as you correctly state but the difference is only the pcb interface plus the firing method.as for the pump i thought the socket should be rounded on the corners instead of square.but i have not looked at mine for three years.which brings me two the question is the fbh off a rover 75?