This install should take you 30-60min to accomplish, Having someone help is always a plus, but I did it on my own
Chock front wheels & Jack up rear one side at a time and support with jackstands. I used 2 per side for safety reasons. remove rear wheels.
Using a wood or rubber support Jack up center of rear axel with enough pressure to remove parts in next step. Keep floor jack with pressure under rear axel
Remover the lower shock mount bolt/nut and remove sway bar end links. Repeat for other side. Swing these out of the way
Slowly let the jack down, lowering the rear axel enough to remove the coil springs. You may have to fudge with the axel a bit to remove, repeat on other side
Remover rubber spring support and install in spring with spacer as shown. repeat on other side
Reinstall both coil springs. You might have to use different jacking points , or pressure on the axel to install the springs w/ the spacers
Jack back up the axel, and reconnect the lower shock mount nut/bolt and sway bar end link. repeat on other side
Reinstall tires, remove the jackstands, your done!
Below is a pic of 5100's @ 2.8, 1.5Body Lift, and the TG 1.5 rear spacers.