You have to have the pinch bolt. Nothing else holds the upper ball joint sleeve in place. It should be at the top, outboard side, bolt head faces forward. Clean the layers of caked dirt off and you should find it.
Once that is out soak the area around the top ball joint in PB blaster or something similar. WD-40 isn't good enough, but you need something that will sit there, pool up, and break up the dirt. Then take a chisel and drive it under the lip of the current bushing. That should help to take the bushing out.