I recently installed the 69 Series NVU gauges in my 67 Camaro. I really like the look and functionality of them. Knowing the exact voltage, water temperature, oil pressure etc.. is what I was looking for and they work well. I am having problems getting the water temperature, fuel gauge, and speedometer to read more accurately though. The speedometer at lower speeds (below 45 mph is up to 5 mph off), but above that is spot on at freeway speeds. The temperature gauge is installed in the drivers side head (I have Dart aluminum heads if that makes a difference), and the Sniper temperature sensor I have installed in the intake manifold. At 200 degrees and below the Sniper and my NVU gauge read exactly the same but above 200 at the hottest I've let the car get the Sniper will read 217 and the NVU gauge will read 230 degrees. I bought a heat gun and verified that the Sniper is the gauge reading accurately. My fuel gauge, when the tank is full, bounces all over the place. It isn't until the fuel gets to around 1/2 tank that the gauge stops jumping around and sits still like it should. I also can't get it to read accurately. It reads over full at full tank and runs out of gas at 1/8 tank. I've had 2 different shops that specialize in this kind of installation and neither can figure it out. Does any one have any experience with these issues? I'm ok with the speedometer being off but it would be nice if it were accurate. The stock one worked perfectly. The analog water temperature gauge worked perfectly too that I had installed previously. I've tried reaching out to NVU but have never been able to contact them. I always get their answering machine and leave a message to have them call back which they have never done. I would never recommend buying NVU gauges to anyone based solely on their customer support. It is non existent. I would've bought Dakota Digital but at the time they didn't offer the Vintage look I was after.