2009 F-250 Front Sway Bar Bushing Replacement

[Dano62]

I just replaced my front sway bar end links on my 2009 F-250 4x4.  This was a piece of cake job and I figured replacing the sway bar bushings would be just as easy, but I can't for the life of me figure out how to access the bushing bracket bolt heads that are boxed in on the inside of the frame.  Hated to do it, but I grabbed the end of one of the bolts with some Vice Grips to prevent it from turning while I wrenched the nut off.  Once I wrenched the nut down as far as I could, I moved the vice grips above the nut, but I couldn't grip the bolt tight enough to get the nut the rest of the way off.  Now I have one nut that I can't get to move either way.  I do have a Fisher plow frame that's fastened to the frame all around where the bushing bracket is.  Not sure if I'll have to remove the plow frame to hopefully provide some type of access to the bolt heads.  It seems like kind of a crappy design.  Replacing my cab mounts was a walk in the park compared to this.  Anybody have any ideas on this?

[Hillbilly Auto Supply]

Hate to say it, but you might need to lower the plow frame to make room. It's a pain in the ass, but if there's one thing I've learned from working on Fords, it's that it's always gonna be a pain in the ass.