If you are installing along. I made a platform from a 2x6 that reached under both drums or trailing arms at the center of the spindle. I screwed a piece of plywood, in the center of that 2x6, that would reach under the axle tube. This "Tee" went on my floor jack and allowed me to jack the axle into place. This will get you access to the reward bolts first. You pin them and then can jack the axle up to pin the forward bolts.
If you are working along you may want to set the axle on the Tee and then raise each end onto boxes to allow you to slide the floor jack under the system.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles