Like the title says I just purchased a 87-89 SSP CHP 160MPH instrument cluster to replace my existing cluster (a 90-93 cluster) which does not work properly. I got a good deal on the cluster and its been tested and is in good working order. Plus, I figured its a good investment since I could always sell it do to its increasing rarity. I'm guessing the previous owner of my car put in a 90-93 cluster because he was tired of the old 85 mph speedo. Anyway, I'm wondering if there is anything I can do to clean up/ refurbish the cluster before I install it? I've never really messed with these before. I just know that the cluster that is currently in my car is not correct. Any tips appreciated.
Here's a pic of the cluster...
Here's a pic of the cluster...