My rear factory bump stops looked a little funny as in the rubber looked to be separating from the metal mounts. I checked how secure they were by tugging on them and they both literally fell off with little effort. How they didn't fall off on the highway mystifies me. So I went to unbolt them and of course the bolts snapped off. The plan was to weld the the front bump stops on to the metal frames of the rears. I previously cut the fronts off to install the ACOS.
This is the passenger side. Rust was minimal but the drivers side was much worse. Was horrified as I havn't seen rust like that on my rig. Only spent the first four winters of the Jeeps life in Indiana but the salt did lots of damage.
Welding nuts to the studs failed. On to drilling out the broken bolts. Why? If my idea to fabricate new bump stops failed I could buy replacements and bolt them in. Besides I have lots of experience drilling and tapping broken bolts, especially on this rig. I think originally the bolts were 10mm x 1.5 but I wanted to go 5/16-18. Started with 5/64" drill and slowly stepped up to 17/64ths. Had use a scissors jack between the leafs and broken bolts for drill space.
Used plenty of tap oil and kept the metal chips out of the way and got good results on all four holes. No broken drills or taps. OH yeah, I even tried the easy outs and heat. Just like the cross member bolts they only came out the hard way. This project was especially difficult as I'm adjusting to wearing contacts and on top of that, mono vision. One eye corrects for distance and one eye corrected for close up. It's difficult but working out.
Didn't take pictures of making the new bump stops but here is the final product. I just used 2" pipe to extent the bump stop cups to my desired length and welded them to flat stock. I made them about 3/8" longer than stock thinking they might compress more than the old rears. You can see where the rust trashed out the metal plates.
Here is the the bump stop touching on drivers rear side. Just jacking up the rear didn't allow enough compression for it to make contact. Had to jack passenger front to get the rear to articulate more. Looks like the new bump stops are crooked but its a trick of the camera angle because the body is tilted.
At full stuff. There is actually a little more space on the right side of the tire than the picture shows. About the same as the front. I plan to go 35's someday and when I do I can add another puck or spacer to the frame rail or more trimming. ...and steelies instead of alloys

Fun project!