Idiot Lights to Real Gauges

That's just to get the wiring correct when you pull the old cluster out.

The gauge housing is also different, so you need the gauges and the housing. I suspect the printed circuit is different, too.

That's why you would have to rewire the cluster connector. If you have the long gage cluster,then yeah the pod is different. If you have the one with the clock and idiot lights the pod is the same. You still need to rewire the connector and get the right sending units for the gages to work.

If you have a round speedometer and idiot lights, the pod is different than if you have gauges. There are more than 2 pods.

You need to change the housing that holds the gauges. You can reuse the rest of what you already have.

When you remove that housing, you will see the harness connector at the lower right. It is this connector that needs to be repinned according to the link provided by 80malibucoup.

While you have the housing out of the car, clean the harness contacts with a pencil eraser to ensure good contact. Also, while you are repinning the connector, also clean the contacts at the connector.

Additionally, to allow the alternator to work properly, you will need to either replace the wire to the light with the resistance wire that is used with gauges, or keep it connected to one of the bulbs at the right of the pod (what I did). I made this swap in my wagon about 16 years ago, so I don't remember all of the finer details anymore.