When I enlarge your full frame picture it looks like those upper brackets have plenty of room to create a little clearance for the shocks by grinding. That would be my first option. Turning them upside down will probably eliminate all the dampening action by moving the fluid inside of the shocks away from the orfices that meter the fluid. Another approach would be to grind away some of the weld that holds the upper mount to the frame, tip the mount out and down slightly to clear the top of the shock, and reweld it. Since you're starting with a blank canvas where suspension geometry is concerned, getting it right the first time is pretty unlikely anyway.
Jerry
