If you are keeping your original springs and don't want to lift the rear end. Remove the two bolts on each of the rear shackle brackets that bolt to the body (9/16 socket). This will allow you to drop the rear of the springs to the ground easily once the old U bolts are cut. Then with tires installed on the new axle you can roll it under the car and then lift the springs up to it. Much easier than wrestling the axle across the springs if you don't have help.
