All of mine came undone with a 3/8 ratchet. No spraying or heat needed. I reused my bolts.
Mine has always been in either NY or MA,but my guess is it was never driven in salt.
I did it in an ice-cold carpeted garage with no lift. It took me probably 40 hours. Maybe more. It was something I didn't want to rush. I'd rather go slow doing something right the first time. Had scissors jacks and stands..
...a 2x4 in the slot under the rocker panel running full length of the rocker.
You read about everything that you have to unhook?