I did a replacement of my gauges as part of my rebuild. I opted for an "all in one" gauge for fuel, volts, temp, oil pressure. Also bought a new tach and trim gauge. My boat only has 3 now. I removed the speedo all together since I use GPS fish finder and am not really worried about knowing speed anyway. I made a new dash panel to cover the old holes and put in my new gauges and accessory plugs.
When I get a chance, I'll update my thread with some pics.