http://offroaddesign.com/catalog/RearShockBrace.htm
The shock mounts on square body pickups take a lot of stress and are only single shear. This leads to cracks in the frame that comprise the rigidity of the truck.
To prevent cracks in your frame, add an ORD shock brace! The kit makes the shock mount double shear and helps spread the load more across the frame.
http://offroaddesign.com/catalog/RearShockBrace.htm
Installation only requires drilling 2 holes!
If you have any questions we are happy to help!