I second everything Tim's said. As a matter of fact, it was after chatting with him that I decided to pull the trigger on my AALs. I put them on last weekend and the difference was DRAMATIC... both in ride height, spring arch, and ride quality (stiffer, but more "secure" feeling; less squish, if that makes sense.)
After having the Dakar's under my 5500lb truck for 9 mos and several thousand miles of off-highway driving, they were cooked. Totally flat at best, neg arch at worse. The rubbing was killing my fender wells, and I was growing to hate the stinkbug look. I didn't want to invest in a new $500 custom pack just yet, so I went with the simple answer first...
Fifty bucks on the AAL, two hours in the driveway, and I got my leafpack back.
Full arch. I'm hopeful this AAL will get me through a year or so.
Slight rake looks good, too.
Oh, and I also second the vote for frame reinforcement plates. Got my from CBI not DeMello, but whatever, no matter. The difference in that "planted" feeling is night/day. Highly recommended.
My rear setup now:
OME Dakar pack
OME AAL for 05+, but drilled out for Gen3 center pin (inserted as 3rd leaf)
All-Pro 1.5" (3/4" lift) greaseable shackles
Bilstein 5125
CBI frame plates
Good luck whatever happens!
wc