Don't know the answer to your question, but you can always replace your gauge cluster with a custom cluster with aftermarket sweeping gauges. I'm guessing because it looks "cool"? There's a guy on the s-chassis forum I frequent that does great custom work for custom clusters, gauge pods, and other sweet lovely pieces. Let me know and I can get his contact info for you. I can tell you, it won't be cheap and cost goes up depending what you want done.