Gauge idea

Ok, seeing the gauges don't read correctly when you do a swap, i was wondering. Tell me what you think, i was thinkin about replacing the whole gauge cluster completely with a custom enclosure and get an autometer speedometer and tach. These would read correctly right? Is there a gauge that accurately reads how much gas i have left, and also one that would show if i was overheating? Also would it be possible to rewire all the important things like check engine light, and low fuel light etc. to a different area on the dash? Any input would be great. Thanks
-Deze-