you need to get under the wire ring, heat it, cut it ,pull it out with vice grips, the old books show the use of a "diamond point" chisel---the tip is a square ground at an angle, but a wizzer can cut the ring --then it is easier to grab with vicegrips, the bearing rings are then pushed out with a punch, at assembly the grooves are lined up, lubed and the clips centered and tapped in ---look in an old Motors book, it will have pictures
I have 4-5 kits, never used(found in trash) always found used joint assy in as good as new condition for 2-5$