Bolt the Ball joint to the hub first and then to the A arm.
Put a small jack under the geared hub and raise it until the new ball joint bolt is through the upper geared hub hole. Hand tighten the slotted nut.
Line up the new ball joint and drop the 4 bolts and washers into the holes. Tighten the bolts to 37 ft-lbs. Tighten the 15/16" bolt to 73 ft-lbs while lining up the slot in the nut with the hole in the bolt. Tighten the nut to line it up; never loosen. Insert a new cotter pin.