what gears do i have
 

I have a set of 5.83 gears for a Ford 9".I got them free in a nodular center I bought and was wondering what brand thay are.The guy I bought them from said his son ordered them and he didn't know.The numbers off them are: FD9 184 J6 for the ring,and FD9 120 J6 is on the pinion.Just trying to see if they are any count.Any info please