Add-a-leaves will make your ride unbearable,and wheel travel will also suffer.I tried that on my zuk and was very unhappy.You could install the Calmni 2" shackle reverse lift,and their 1" bodylift(all bolt on parts)to fit 31's with room to spare for about $300 .
I ran 2" add-a-leafs and 2" longer shackles. It gave me a little over 3" lift. Plenty of room for 31's.
My ride wasn't that bad. I made the mistake and bought ProComp shocks. They were way to stiff. The trick to using the add-a-leafs is this....don't just add them in. On the front I removed the second spring and put the add-a-leaf in it's place. On the rear I removed the overload spring. At some point I mixed and match a few CJ leafs in there. I had pretty good flex out of my rig. You can ask several of my friends that saw my rig with that set-up.
I'm now SPOA, but the add-a-leafs worked pretty good and it was cheap. I bought the add-a-leafs and shackles from Off-road unlimited for around $125.
Everyone talks bad about add-a-leafs but I liked my set-up when I was using them.
I pulled my springs and took to a spring shop and had them rearched.I had an extra leaf added to the front to hold up my 4.3 and winch,But I like what I have,but its a parade/trail ride,not a daily driver,I do have a new 3" hvy duty set up for the rear from calmini with bushings and driveshaft spacer if you put the rears up front for sale.RR
THANK GOD FOR VETERANS AND SUZUKIS-BOTH KEEP YOU FREE. FOUNDER;INDIANA SUZUKI EMERGENCY RESPONSE TEAM