Looks like you can get to all four bolts holding the axle and if that is the case the easiest way to mount the shocks would be to drop the axle so you can get to the top stud. No need to cut the brake line if you have a couple of floor jacks and support the center of the tube. Just let the jacks down slowly and let the tube rotate on the center support.
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