Oh yeah got them all in even the fronts, which didnt need replacing, in 1 hour, and yes I really need new shackles BAD, from running so long on the bushings, or what was left of them, it really tore the bolts up pretty bad. not bad enough to worry just yet. Now, it rides better, no more noises, and it gets a little better movement up and down. Energy Suspension is awsome. All I did was jack the rear end up, place jackstands under the frame. broke the bolts loose with a breaker bar and pulled the old ones out by hand. the New bushings went in a lot harder than I expected, that is what took so much time.. then went to front of the leafs and pushed them out with an air hammer slid the new ones in, put it back together and away we went. not as hard as I thought it was going to be. thanks guys.