Purchased from Benz Spring Company, this 1.5" add-a-leaf was a great addition to the truck.  I recently got a set of BFG AT/KO 295/75R16's on and they rubbed a little.  Had to remove the ProFlaps mudflaps.  Here is the install of the springs.

If it's one thing you need to do is jack these baby's up!  We spent most of our time raising and lowering things.  Our problem started with only have a 1-1/2 ton Jack which made it creak when you lifted the front up.  We placed nice six ton jacks just behind the spring hangers.  These we up pretty high.  Hindsight being twenty-twenty, it would have been a heck of a lot easier with a lift to raise the whole system up as we spent more time jacking than actual installing.

Well, we got the wheel off.  After that, we removed the ubolts and dropped the axle down as far as we could go.  Note below the distance on the brake cable.  This proved to be a problem later during the spring insertion.

Here's my buddy Chris chopping out the rear leaf spring retaining clip.  Watch the sparks fly!   

After the clip was removed, we lower the axle as far as we could.  We would find out soon that the brake line on the passenger side was extremely short.  So short we had a heck of a time squeezing the spring in.  We were almost ready to drop the front bumper off; which would have made the job easier.  We had to drop the rear spring from the hanger; but luckily after a few minutes of scratching the head and trying different attack angles, we managed to squeeze it in place just fine.  Re-aligned the center pin after cutting it to length.  Oh, sometimes the realigning requires a come-a-long.  Glad we had one handy.  The we replaced the u-bolts and re-torqued as required for even pressures.  Slap the wheel back on and move on to the other side.  Here is one of the leaves installed; but still on jacks.

The second side went much quicker as we had experience under our belts and a longer brake line!  The resultant lift is pictured below.  The lift gained in the 1.5-2.0" range.  Just a slight forward raking.  Great for when I put the trailer on the back!