you will need spring compressor for to compress the springs here are the steps
1. remove the strut from the truck(one big bolt n nut at the bottom and 3 small nuts on top "not the big one in the center")
2. compress spring till the top hat is separated from the springs, make sure to give a good 3 inch gap between the spring and the top hat for the spacer
3. remove center nut on strut
4 put in spacer
5. put in center nut
6. release spring compressor