For whomever reads this from now on, I may have the answer to stuck leaf spring bolts and bushings problem. I used PB Blaster every few days for three weeks, even to the point of taking the rear bumper off so I could shoot the top shackle nuts. The front main leaf eye bolts have a small hole in the body that you can at least spray them. Three weeks, still would not budge.
Then I tried Loctite Freeze & Release, which "ultrafreezes" the nut and bolt causing "microfractures that draw in the penetrant", according to their website. Not only did this break the nuts free, it also loosened the bushing sleeves around the bolts, so no bolt cutting for me!
I do not know if it was the PB or the Freeze & Release or the combination, but they are all off now!:guitar: It was about $17 a can and each bolt gets a 5 - 10 second blast, so it will not last long, but that was a whole lot cheaper than my time to cut a hole in the floor or frame rail and weld in nuts.