Hey yall. Currently I have a 2-2 (springs up front & shackles out back) kit on the truck. I would like to go another 2" lower in the back but am unsure what I need to get to achieve this and dont want to buy a whole new kit. Any help would be great. Here's a current pic.

 

I would keep an eye out for some used 3" leaf springs, and then put your shackle on the lower (1.5" drop) hole, so you would be at 4.5" total drop