Re: CJ5 Lift ??
Not all 31" tires are the same height.......mine are approximately 6 3/4" from the ground to the bottom of the rim.
I measured my frame from the ground to the bottom of the frame just behind the front spring hanger. It measured out at 16", but I know that my springs are sagging a bit........maybe a 1/2" or more.
Your friends re-arched springs have probably sagged. Re-arching doesn't last long on old springs. A guy at a spring shop told me they will last maybe a year.
You can gain back a little height by re-building your springs. Mine gained a half inch of free standing height by just grinding off the rust. I got still more back when I finished painting them, installed Nylon pads (Teflon is suppose to be better) and new rubber bushings. It also gave me a softer ride and better articulation.
'77 CJ5 Fozzy Locker
20 degree RTI 1250</font color=red>