I added Rusty's 1.75" shackle and spacer kit on top of my rustys 3" kit. However, to get everything to play nice on my DD I also had to add a new track bar, remove the rear sway bar (you may have already) and added front discos. I didnt need discos in the front but I did need longer swaybar endlinks. I also ended up needing to shim the rear to fix driveline angles, a sye would be even better. I could probably benifit from longer shocks, but I am waiting till these ones are worn out. I didn't have any issues with the stock CAs, dont know if I was just lucky or maybe it would be a benefit I should look into. I could fit 32s right now with no or minimal trimming, but Im saving up for the 33s and gears.