Anybody done any wild dash/instrument customization?

I was looking into a pair of double gauges for my 65 valiant. A 7000 tach with fuel gauge at bottom and a 120 speedo with a coolant temp gauge at bottom. You can also get them with turn signal, high beam, and oil pressure indicators built in. Haven't dealt with them yet, but heard some good about newvintageusa.com custom built nice looking usa made gauges.