Spring Spacers - Range Rover
Check out this site, It should answer the spacer size questions for the Aluminum Stock. Looks like 4" is what he used.
As for brake lines. If your doing 2" you may need them. NOt sure on your vehicle but that seems to be about the Maximum without extending lines. Your probably OK stock but you'll want to check to make sure. Good luck. Todd
You can use 4" round alum stocks for spacers. Basically, you're simply installing the spacer directly under the spring perch plate. Drills two holes and use longer bolts and you're done. While you're at it, make up some heavy duty spring retainers for the bottom of the spring using 1/4" x 1 1/2" plates. You can do the same for the top of the spring as well. Although, couple of worm gear hose clamps can do wonders up here too.
For the front, you have couple of options: drill a large hole in the center and mount a shock (damper) with a stud or make up a simple stud to eyelet converter. Again, this is simple to make. Look around the web for some ideas to "borrow". This is very popular in the front suspensions of Wranglers when the owners want to go to extremely long travel shocks. Check out www.Rubcionexpress.com for some ideas.
Making sway bar disconnects is also very simple. Check out http://www.d-90.com/, under custom mods for a picture version of this. It helps to tach weld the washer on one end of the hitch pin.
After you disconnect the sway bar, you'd simply rotate and tie it out of the way. After it's disconnected it's a good idea to hang to all hardware inside the cab. Leaving them connected on the end links may end up in lost bits and pieces!
As for your brake line length issue.....on the rear, you can gain an inch or two by simply bending the brake line bracket on the rear diff upward. On the front, you may need to get more creative with the ABS wire and your brake lines. The only way to really find out is simply to articulate the suspension through the entire cycle and see what gets stretched where.