my jeep coils i got were 12 inches tall and i got 3.5 inches and i think it was 2 inches over stock but the coils were 14 inches when i got them. maybe build some cheap longer shackles and stick in the whole spring and get a smoother ride and more highth. just an idea. i made longer shackles alittle bit ago and i wish i didnt cut my coils, they are a little loose now.
heres what mine looks like with jeep front coils cut down to 11 inches i think.
and thats how i put them in. i wore a football helmet and im glad i did because one strap broke and shot out at me. it bent the face mask!!!!!! haha o well im all good now
You're talking about what they call the zuk-mod over on yotatech, that may help with your searching.
I've done it. I used 14 inch 125lb coils. I know some folks like them but I've gotta tell you, I don't like it at all. They lifted the rear about 3.5 inches, which is higher than I wanted, they're soggy and squishy and bouncy, and I still bottom out when loaded for a long trip.