I guess its a little different than say the infamous front bumper frame rail nuts breaking loose but still...You really don't think if you egged the hole out a little and stuck a nut on a bolt in there and welded it in it wouldn't hold? How about if the op did that and added a Zray cross member which has a bolt going thru it from the lower control arm? I would think that strong enough, and you get that sweet jackpadded xmember to boot! I have never had to deal with this, but many others have, curious if those repairs held up and how they were done. If the op wants to stay with the so so stock cross member, maybe if you welded a new nut into a piece of pipe, then cut the old hole to the larger pipe diameter and welded that in there...I would think that as strong as the factory set up. Is welding a nut to a plate, cutting open the rail and sticking it in there and welding it in, then welding the access hole back up really necessary on a street car? That's a lot more work for sure... I went to blkfords trailer site but could not find the video., but I get the idea..maybe some more folks will chime in!!