Is it possible to replace the basic gauge panel in a 95'Roadmaster wagon to a full analog gauge dash panel from an Oldsmobile Custom Cruiser wagon or an Impala SS? If so how difficult would it be? My 95' has a temp gauge, fuel gauge and speedometer. Rest are idio...no wait, can't say that. Intellectually challenged warning lights.

 

A lot of people had no idea what they were looking at when they looked at the gauges, if they did. Soooooo, they chose the cost saver a warning lite and when they came on a lot of people didn't pay attention to them either.
I don't know the correct answer to your question, but You might get away with just changing the cluster since the electronics are usually contained in the cluster.