It is a taper fit…Keep soaking it down with Kroil or PB blaster. If there is no room to swing a hammer, perhaps you could use a small bottle jack right underneath the taper stud, then jack the truck up a little (keep the tires on the ground, byut get some tension on the jack) and hit the track bar on the front side, right next to the taper stud…I'll bet it pops.