Adding gauges to A-Pillar help

hey guys I have a 97 GS 2dr auto and I'm looking to add a voltage gauge, an oil-temp gauge and maybe a 3rd gauge, is this easy/possible? are the wires behind the cluster already there or do I have to run new lines?

if you're just doing it for the look, just leave them unhooked and run only power to them like every other ricer out there...

I'm actually NOT doing it to rice out, I'm one of those few people who actually give a f*** how my car is doing. Especially oil temp and car voltage. :) A-pillar is just a good place for it imo. So, can you help?

voltage will have to be run off an alternator signal somewhere in the wiring, i'm not sure if the battery "idiot" light on the cluster will be sufficient (seeing as how i've never installed one of these) or the easy way out is running a wire straight off the alternator hotline (not suggested but easily done)

as for the oil temp. you will need to tap a whole in your oil pan drain plug bolt and thread the sensor in there then run the wire to the gauge