First, lets establish stock height. It is 19" from wheel center to the edge of the fender measured striaght up from the wheel center on all four coners. I say this for the following reason.
When I initially installed my lift, I was amazed that it measured as 3-1/2".
I went from 18" to 21-1/2" center to fender.
I have the OME 926 mediums w/ 948s in the rear - no spacers, clevis, etc... I've run this for about six months now, and the front springs have settled in at about 2" over the stock height (21" center to fender). The back has only settled 1/4" at most, as I rarely have any load in there.
As you see, the measured 3-1/2" was realy only 2-1/2" as I had an 1" of sag before I started. And now, I've lost about 1/2" to the springs "settling" in.
All-in-all I'm still happy, but am considering a top plate in the front to "level" things out again.