So... Here is my method.
Lift the vehicle, crack the front bleeders SLOWLY and try not to get blasted with oil. Let that drain out.
Remove the two 12mm bolts holding the line on, gently pry on it on two sides to pop it off, tuck it out of the way.
Plug the hole on the top of the shock with something, i used a red plastic plug.
Remove the lower bolt
Remove the 19mm nut on the top of the shock and it should drop out, drain the oil out of it, you don't need to compress it but you can.
Press out the old and press in the new bushing on the bottom, I basically had to rig up some stuff for this.
The top cushions just get pried off, pb blaster/wd40 help a lot.
Put it all back together, put the wheels on and lower it down most of the way but not fully, then just fill up the reservoir, start up the truck and then I switch it to High mode, the truck will start to raise up and keep an eye on the fluid level. Now lower the truck completely. I think I added in 2 quarts total. Go back to Normal height and check the fluid level That's pretty much it as far as I can tell, rides good and goes from L to H as it should.
Rears are not as bad and I'll wait a little bit, lower ball joints are next.
