here's a cut and paste that I saved from a different thread (sorry I can't remember who originally posted this) that I thought was pretty useful for figuring out how much lift a YJ has on it
Lift high increase over stock is determined by:
RH = Actual Rocker Height
TH = Actual Tire Height
BL = Body Lift
SH = Shackle Length
(RH - 18) - (((TH - 28) / 2) - (BL))
If RH = 26" and TH = 33" with no body lift we get
(26 -18) - (((33 - 28) / 2) - (0)) = Total Lift of 5.5" lift over stock.
We can further determine the spring lift as
Total Lift - ((SH - 4) / 2)
If shackle length bolt to bolt is 6" than Spring Lift is 5.5 - ((6 - 4) / 2) = 4.5" Springs.
Make sure to measure on level smooth ground just to the bottom of the rocker panel under the doors.
Orange Jeep Club #88
˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı