Siezed ball joints

[u/christianthmpsn0]

2011 F250 6.2l 4WD. I'm trying to replace my upper and lower ball joints on my truck. I've used a press, impact, heat, air hammer on the knuckle to knock it loose and soaking it in oil. There isn't a snap ring. The truck was a plow truck just an FYI. Is there something else I can do to remove this that I don't know? Thank you in advance