Just got a 96 Fleetwood Brougham!!

I just got a 96 Fleetwood brougham navy blue with blue interior under 56k miles! car runs great. Only thing I dont like is that when you look at the dash all you see is fuel, mph, and miles. Besides putting a tripple pod cluster on the piller, is there any way to monitor temp, rpm, oil pressure, battery volts? I have a 94 and 95 caprice as well and all of those things are on the dash. I have seen programmers that have all of them and I assume that plugs into the obdII and just reads the computer but they were around 300 bucks or so. What is the common thing to run and is there a cheaper route then the 300 dollar tuner?

Anyone use the Scan Guage 2. Looks like a good product for around 130 bucks.