I installed my P.A. 3" body lift last weekend. The biggest problem I had was the shift cable relocating bracket holes did not line up. Had to knotch top 2 and also had to pull cable off and re-adjust and bend shift lever a little bit.
As far as the fan shroud goes you can easily just break the lower tabs off with pliers a little at a time.
overall, it was pretty easy but time consumming.