As I get ready to add a 6"superlift and 35 BFG km2, I changed out the shackles for 2" shackles but noticed that the leaf springs have sagged to nearly flat. I am going to add a leaf but would i get the 2" of lift from the long add leaf under the main leaf, as I would from a short leaf under the cluster?? Or should i just put both on?

 

You didn't specify what your driving, but I added a long leaf to my gen2 right under the main leaf and it put mine up 1.5" before it settles in, it also helped to put the arch back in the springs

 

Good point, I decided on starting with the long then getting short