If your going to do the 1 inch body lift, most people suggest doing the 1 inch Motor Mount Lift. Using the MML you will help keep driveline angles in check and avoid the vibes.
I just installed the Currie 1" body lift, and I feel for $10 more it costs then the Performance Accessories kit it is more then worth it. The overall quality is far superior then the regular resin blocks. They use black powdercoated aluminum and the mounts are shaped to fit over the original body bushing.
Plus the Currie kit comes with Grade 8 Hardware, the PA kit comes with Grade 5.
I got mine from www.redrock4x4.com
, they are a vendor here and will take care of you