Ammeter to Voltmeter...who does it?

I would really like to keep the stock look but it's my daily driver and plan to also modify the oil light bay right beside the ammeter and put my oil pressure gauge up there. I see Darts being parted out from time to time and will pick up an extra cluster to store away if anybody ever wants to restore it back. I was really trying to keep everything bone stock looking but finally gave into convenience and functionality. I drive it every single day- why not set it up how I want it to work?

I tried hiding my stereo everywhere and there was no place it would fit other than in the trunk or on the floor under the seat using an I.F. repeater to control it but I couldn't see the face. Then I just thought why am I making this so inconvenient to use every time I'm in here? I mounted it up in the radio bezel and have a spare bezel off ebay squirrelled away now.

This could be the last car I'll have as my own driver. We keep my wife in a modern newer car so we have something for long trips. My son can do what he wants with this one when I don't drive anymore.