I actually had one of those start to crack on me, so I replaced it with the newer revised one from ford that I got for super cheap from another CEG'er, his tour got totaled before he could put it on. Anyways, my dad and I put it in for a total of an hour of work, we had to use a blowtorch on the bolts for a couple of minutes because they were rusted on there, but the pretty easily came off after we heated them up a bit.
Do those mounts have to be Calibrated also? After I installed my new one it, the car drove better, but when I back off the gas I still get a decent amount of bucking... Not nearly as bad as it was though.