jack it up,put stands under the frame just in front of the rear springs. Let the jack down,then jack up the rear axle under the center section until the rear is picked up an inch or so.Then remove the bolt securing the shackle halves. Knock them off with bar and be prepared, the spring may rebound slightly, no big danger. The pins are threaded, so if you're lucky they screw out.You have to drive out the threaded steel bush in the spring eye and frame hanger.Do you have a service manual?Do you know how to press out the spring bushings? Wear heavy gloves and glasses
