Lowers were very easy to install,,,,but more drilling.
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0563.jpg
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0562.jpg
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0560.jpg
Then I removed them so I could weld up the boxes.
First I sanded the paint from all the seams that I wanted to weld.
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0564.jpg
Then start welding,,,this wasn't easy. Pretty limited space and the hot sparks didn't feel good.
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0582.jpg
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0580.jpg
http://img.photobucket.com/albums/v461/HOSTIL1/Solid%20Cobra%20Rear/IMG_0569.jpg