I don't use a spring compressor. with the front end up on jack stands, I remove the shock, put a jack under the lower control arm, then lift the truck up by the control arm, using the weight of the truck to compress the spring, unbolt the strut rod by removing the lower bump stop and sway bar link, then unbolt the lower ball joint, get it to release from the spindle using a hammer to the side of the spindle where the stud of the ball joint goes through, then slowly lower the control arm until you can take the spring out. Then reverse to reinstall. It would be a good time to also replace the lower control arm bushings with urethane bushings and the strut rod bushings. this way the caliper does not need to be disturbed.