Keep an eye on your rear bumper mounts if you have an aftermarket rear bumper, nut strips or not. I have a c4x4 rear bumper with tire carrier, and it was just too much stress for the unibody with the weight of the tire, and taking hard hits.
I welded up the cracks, ground the welds down then welded some 3/16" plate to the unibody, and made some 3/16" plate spacers for where the nut strips attach to the bumper.
http://i203.photobucket.com/albums/a...pssi6btpcu.jpg
Plate welded in.
http://i203.photobucket.com/albums/a...psvtfsxpfp.jpg
The easy way to remove/install a bumper!
http://i203.photobucket.com/albums/a...psfprdlqkx.jpg
It's now as stout as it's ever been, doesn't flop around when going over bumps anymore.
