No wrench or socket can go on it. The nut is against the spring. No idea what to do.

 

It looks too rounded to get an open end wrench on it. Hacksaw or sawzall between the head of the stablizer and the bracket to cut the bolt. Or cutoff wheel on the head of the bolt, knock it inwards and you should have enough room to angle the bolt out the nut side. The bolt and nut need replaced anyway.

 

**** me dead

I cant believe what I see on the underside of (presumably) salt affected US roads ?

You could turn my XJ upside down, make it into a dinner table, and eat your salad off the underside, no plates needed

If I was you, I would buy a butane torch, save you HOURS

 

Wasn't so bad around here until they started using salt instead of sank and ciders about 10 years ago.