My buddy and I just did the 1.5" BL on my 04 XLT yesterday! It only took us 3.5 hours from start to finish! We didn't have to remove either of the bumpers.
Everything went pretty smooth, but we did have a couple small glitches. The locking oil filter wrench from Harbor Freight is a must for this! They make holding the metal disc a breeze! I didn't spray the bolts prior to doing this, we just sprayed them right before we started and then took a mini torch (from Harbor Freight also) and hit them for 45-60 seconds then used an impact. Worked like a charm!
Now for the small glitches:
1) The bolts from the front "A" mounts did not work on the "C" mounts under the driver seats, they were too short. I went to Home Depot and got the longest 12 x 1.75 bolts the had (100 mm) and they worked perfectly!
2) The new rear "E" bolts were too long. Since the original front "A" bolts were too short for the "C" mounts, I used those for the rear "E" mounts.
To make that a little easier to understand, here is my update to the original post of the bolts I used:
A= You'll need to order 2 replacements, but save the old ones. The new size is 12mm x 1.75 x 120mm. Bolt depot part number is 6135. If you don't use Bolt Depot make sure to get ones that are threaded for the whole length (this is for the front only, the rest can just have the end threaded).
B= You'll need to order 2 replacements, but save the old ones. The new size is 12mm x 1.75 x 150mm. Bolt depot part number is 6274.
C=
You'll need to get 2 replacements size 12mm x 1.75 x 100mm.
D= You can re-use the old "B" bolts you took from the front seat foot area here.
E=
You can re-use the old "A" bolts you took from the front bumper mounts.