I had the same problem on my Cuda. I took a rotary file in the drill and opened up the hole to where I could just fit a hex nut the same size in the hole. I then started a bolt in the nut and used the bolt to hold the nut in place just flush with the surface to tack it. I then welded all around the hole, then dressed the weld down with the grinder. Worked great, and that nut will never come loose!