Welcome, Glad to here that there is another Trooper, retired from D/D duty that was handed down to the husband <img src="/forums/images/graemlins/cheers.gif" alt="" /> <img src="/forums/images/graemlins/kewl.gif" alt="" /> <img src="/forums/images/graemlins/cheers.gif" alt="" /> OME 912's (GREAT BY THE WAY <img src="/forums/images/graemlins/cheers.gif" alt="" /> stiffer than stock, but not by much, *maybe it was the new shocks??)and a T-bar job, was enough for me, unless you are thinking major SOA kinda stuff. The 285's will fit with ease. At full stuff, I have several inches of room in the fender-wells in front and back.
Air shocks? You mean like airbags? No idea man.