I've done a little bit of research on this myself, But I'm also looking at swapping my rear to an 8.8 from an explorer, 97 or later comes with disc already, the proportioning valve from the Rubicon will work just fine for this, then your looking at break lines, I haven't got in to it enough yet to tell you if you could grab the brake assy from the 8.8 and make it work??? not sure. By the end of summer I should be starting my build thread and it will be a part of it, don't know how long your time frame is, but by the end of next month I'll be one happy man in my garage, with parts spread every where! Best of luck to ya!
[URL="http://www.jeepforum.com/forum/f22/getting-what-she-deserves-hi-lines-lo-center-1260279/"]MY BUILD:A Slow Process![/URL]
2003 TJ, 1" body, 33X12.5 Swamper IROK's, Rampage top,