Re: ZR-2 Steering Box?????
ZQ8 is the Xtreme suspension package. That's the common upgrade that many people do, for the quicker steering ratio. It may or may not help your steering issues, depending on whether it's your original steering box that's having the problems or if it's other parts (rag joint in the steering shaft, play in the tilt joints, etc.).
The ZQ8 comes out of the Xtremes and Sonoma ZQ8s. I have no clue if the ZR2 uses the same one. It could be upgraded from stock like they are, or it could be completely different since it's the heavy duty offroad package.