Rear Shock Mount

I drove with it many years with the axle moved, tank was only close to Differential. I had never figured out why I kept going through shocks though. The car sat for way too many years before I started work on it again. Now that I have it apart and am studying it more carefully and such, I'm seeing how things relate to each other much more.
Anybody with thoughts on the shocks mounted to the frame rails as opposed to the trunk floor?