Those are welding shields. They protect the paint of the other vehicles from the rays of the welder. They also help contain the welding to "one spot"
Update:
The rear speakers and all of the rear paneling fit back in, so thats all back in place. I had to modify the headliner a bit, but that is back as well. I also got to keep my full a-pillars.
So far, with the roll cage, all that I have lost has been my windshield visors!!
Full interior street monster, here we come
.
Just have to make my sub-marine harness mount, cut the carpet to fit, put in the sill plates for the doors, put in my center pieces. Then just mount the stereo and install a EMS/wideband and the interior is done!
Oh, and paint my swing-outs.