Eric, I am trying to remove the 2 rear bolts that hold the front axle to the frame on the drivers side. Like Lee stated to mount the fixed bracket for the Super Steer trim kit for the Safe t plus. They are not u bolts however, but 3/4 inch bolts about 6 inches long and fine thread to boot. Take a 1 1/8 inch socket/wrench on both bolt and nut. I have got the bolts to slip a tiny bit in the holes, but the nut has not yet broken loose at all.
Trying to be patient. Lots of pb blaster, propane torch at 5 and 10 minute intervals, and a 3/4 inch impact. Going to work on it a few more days this way. Then will borrow a 1 inch impact, or buy a long 3/4 inch breaker bar. I didn't want to push my 24 inch 1/2 inch breaker bar any harder. Bolts go up from the bottom and are to long to clear the I beam on top. It would be hard to cut the top nuts off because of limited access. Failing all that I will see if maybe some of my trucking friends can throw some of their expertise to the situation