Finally changing to 4:10 gears......any other tips, tricks or recommedations?

Okay, I am finally getting to my differential and gears and looking for any thoughts of what else to do while I am under there. I am going to use the factory service manual procedures and drop the entire unit in my garage myself.

So far, I have:

- the complete kit with bearings, ring and pinion etc. that I will have a local shop r/r with stock unit

- speedo correction gears from Marc Haibeck

- C Beam plates

I will buy:

poly bushings and synthetic gear oil/w posi additive

Is there any thing I should look for other than the wear of tear of related items while I am under there or any recommendations from the experienced folks. This is my first time touching the differential, but I think I have all the tools needed for this job. My clutch is stock but fairly new so I'm not going to touch it yet. The 90 Z has 53K on it and the clutch only about 5K.

Thanks in advance and Happy New Year!