voltmeter like my 76 and 82 280Z's. But really a dash mounted voltmeter is not often very useful and just takes up meter space. The times my batteries have failed the voltmeter never did see it coming. As far as an Amp meter, it would be useful but not very practical to run the high current through a dash meter, and using the voltage drop across a low value resistor to determine the amps may be more work than it is worth (for how ofter one would really need to see the current draw from the battery. Take care, Jim