Lower ball joint to Spindle bolts stuck

Another thing you can try...

Put a nut on the bolt and semilightly smack it while turning the bolt head.

If what oldmanmopar said is what happened the shank of the bolt might have gotten press fitted into the ball joint.

I thought I saw that 6 cyl drum brakes bolted the ball joint into the spindle rather than clamping the ball joint to the spindle with a nut,