amp and fuel gauge.

[loctite]

I am going to have to change all my gauges.  I am doing away with the instrument voltage reg. The oil and water after market gauges will be easy to change. What I need to know is what fuel gauge will work with the stock 70 to 0 ohm sending unit.  Also I know most of the elec runs thru the amp gauge, what other gauge will work. I tried a couple i had and they would not work right. Thanks