I have just purchased a '91 z28 that has a Sunpro CP8090 tri-gauge half installed and sitting under the hood. The water temperature gauge is connected but the oil pressure and voltage gauges are not. I believe all I have to do is simply run a wire from the battery to the voltage gauge but I'm not sure what I need to do to install the oil pressure gauge. Do I have to purchase a new sender or can I use the stock one, what else if anything do I need to purchase and how would I connect it? Any help would be much appreciated.

 

voltage just goes to a 12v switched source. Im not sure if you can hook it to a battery or not but you can try

oil pressure you need the fittings for the line, is it mechanical or electric? if its electric you need a sender. you can attach either to the back of the block or just above the oil filter.