Three of my wheelwells are currently 27.5" from the ground (give or take 1/8"), and my drivers rear is at a little over 28". Seems like I remember the "official" spec not being a round number, so 27.5" is probably what it should be. Maybe I have a spring mounted wrong or something. I put control arms on, so it's entirely possible. At any rate, the picture was taken before I did the control arms, so I think I'd still like to drop it an inch in the back.
ST's will probably drop it too much, eh?