I have a 85 firebird with the 2 standard gauges, the gas and mph, then all those dummy lights. I installed a tach and also a temp and oil pressure guage. I now want to get rid of that set up and install the 3-4 pod cluster that looks stock into my car. I was wondering if anyone knew what i definately need to install this, besides the cluster and gauges, as far as wiring is concerned and the plugs..Thanks

Are you attempting to swap out the warning lights and install the factory gauges for the 85' Firebird?

no warning lights, just speed, temp, oil pressure, gas

Get a cluster with what you want, then plug and play.

If the car originally came with warning lights, then the IP wiring harness connectors will have to be re-pinned. Unlike Camaros, you can't just swap a gauge cluster in with Firebirds, you will just blow fuses.