I've heard different stories about balljoint separation on NBS trucks, but here's my personal experience in dropping NBS trucks (don't try to separate the UCA balljoint like OBS): If you are replacing just the springs, remove them from the back of the control arm. Basically, once you have the truck on jackstands, put a jack under the control arm. After removing the swaybar endlink and the shock, ubolt the LCA from the frame (2 bolts), and gently (and slowly) lower the jack until the spring is uncompressed. Lower the LCA until the spring can be taken out. After that put in the new spring and reverse the process. Should take you no more than 30 mins.....