Resurrection time
I just snapped off the lower passenger side shock mount nut, flush to the shock eyelet - the shock is off and I'm drilling it out, tapping it and putting a bolt in there. What a pain in the ass.
I fully expect to snap the driver side lower shock mount - I always get hosed at what should be an easy job.
If you cut off part of the nut right up against the threads, the relief in pressure combined with the heat should release it.