Is it possible to swap my cluster to a cluster with a tachometer while keeping my original odometer?
My car has 45k original miles and I was hoping to keep it showing that but having a tachometer
94 civic Automatic trans

 

Yes. buy a manual cluster. Remove the speedo/odometer. Replace with yours. It unscrews from the back of the cluster. I just did exactly this a week ago. Replace any LEDs that are burnt out too. Or change the color of them if you so wish at that time.