I've been soaking the bolts as much as i can with PB Blaster to loosen them up, but we all know the worse case scenario will happen to me. Well, at least I do....

So, just in case the bolts break the welded nut inside the uni-rail free, does anyone know the size of said nut? I'm thinking i can just drill an access hole, instead of cutting into my rail. Pass a wrench in and go to town....I hope......

 

I don't remember the exact size, but I do remember they are 6$ at the dealership!

 

Search xj leaf spring nut on google and some naxja arrivals pop up there is some good info in them seems like a lot of guys are going through the floor pans and leaving them open for access and just putting a nut and washer on them I know I hosed mine down for about a week and snapped them all off so I changed the bracket to the frame rail