With my cluster, I get a speedo, fuel gauge, and a temp gauge.
I want the tach, oil pressure, and voltmeter. The easiest way I found was to buy the oil and volt gauge and mount them below the steering column, each about 10 bucks... then the tach for a DIS system mounted where ever you want also. It's cheap, and they light up too. Unless your aiming for the stock look...
If the OD comes from the ECM like X says... this is going to get pretty complicated... haven't you concidered using aftermarket gauges to monitor your engine? Why do you want that info displayed?