As far as brake lines are concerned, I didn't extend mine (only have a 4 inch lift) I only had to relocate the brake hoses on the axle and bend a new line across the axle itself. The 'sploder brake hoses connect directly to the XJ hard lines without an adapter. The e-brake cable is a little tricker, from what I have read, the M.O.R.E. e-brake adapter is next to useless, most guys can barely get it to hold the vehicle. Do a bit of seaching, I know that other guys have gotten it to work using junkyard parts.
'94 B4000, D35 TTB, Ford 8.8, 35's - Trail Rig
'97 XJ D30, Ford 8.8, 35's - Trail Rig
'98 XJ Limited Stock - DD