I have a '91 pickup. Rear leaf spring hangers are about 4' 3" apart. I installed Old Man Emu (OME) suspension last year. Ordered them from Kurt at Cruiser Outfitters out of Utah. Quality suspension. I ordered the heavy but removed a leaf spring out of the stack to make it a medium. If I add a shell to the rear or extra weight I have the option of installing the remaining leaf spring to bring it back to heavy. If you have any questions call Kurt (phone number on website). Give him a few days to call you back.
'97 FZJ80 40th Anniversary - unlocked, 2.5" OME, sliders