I need help W/Spindle & springs

[66farmer]

This is my first time posting a question. I'm a christmas tree farmer in snowy North Plains, Oregon. I'm just starting to restore my father inlaws 66 stepside which my wife took her drivers test in years ago. I want to lower the truck but not to the extent of draging over the speed bumps. So i'm asking you to help me with maybe pictures and spec's of your trucks. The attached pictures are of me and my wife bringing the truck home from Eastern Oregon.