Hello please dont take offense to this post, but you dont need a compressor to install the springs, I do this all day long at work,my springs were 3" lift springs and I still didnt use a compressor,jack it up pretty high, use good jack stands,remove the shock first, you have to take off the tie rod end off the spindle , then put a jack under the spindle or controll arm, jack it up to relieve tension on the spindle upper ball joint nut, loosen the upper ball joint nut unscrew it to the top,(DO NOT REMOVE IT AT THIS TIME), remember the jack will have the tension under controll.Lower the jack to put pressure on the ball joints then take a good size hammer and smack the (SPINDLE) right below the upper ball joint, the nut that you loosened will hold the spring from jumping out, (THE NUT WILL JUMP TO THE TOP OF THE BALL JOINT WHEN YOU RELEASE IT) but it cant go anywhere if you leave the nut on the ball joint ,but have it loose about an inch, then jack up the spindle underneath again, to take the tension off of the ball joint nut, remove the balljoint nut , now slowly lower the rotor and spindle down and you will see the spring loosen up, it will only go down so far before the spring will roll out on the ground by itself,if this worries you , put a piece of rope around the spring to hold it in place but it wont jump out if you follow these directions.. to install the spring ,stock springs are easy, lifted are ,a little tricky, just make sure the truck is raised very high, this is the key,the lower the spindle and rotor are the easier it is to get the springs in,I put mine in by placing the rubber cushion on top of the spring then raised the spring up into the top part of the control arm, the slid it into the lower part of the control arm, it will not slid all the way in, just ue a large screwdriver and help it in, put the jack under the lower controll arm ,jack it up, the spring is in two pockets, upper and lower, then when it gets up to the controll arm put the nut on it,,I am sorry if this was too long , I just know lots of you could do this yourself with minimal tools and save money,but as I always say "( if you feel the slightess bit uncomfortable trying this , by all means let a professional do it)" I just wanted to help