Torsion bar removal

clean off offending threads, right up next to the shoulder the flat nut--smack the 3/4 head with a bfh, (repeat) spray pb blaster-- acetone/t fluid mix on the threads,

if your on jack stands-- place car on ground to use maximum force leverage on offending bolt.

it should 'pop' when it breaks loose-- if you have impact-- break it loose manually then impact it tighten /loosen/spray

I would be leery of leaving tension on & popping the ball joints loose.

Lawrence