Which guage or both ?

Wow..didn't mean this question to go this far..however, the information here is absolutely top notch.

The only non stock thing going in this car is set of Bosch headlights off my MG..and it that car could handle them, the Duster should have no probs..oh, and a stereo. ... In my '75, I have or did have a blower engine .

I am dealing with a stock system and from what it sounds like, a volt meter is best even though I could but both in because I am parting out the dash cluster. I am doing this because I am trying to make it easier for Sarah to understand what is happening with the car...and if the gauges are directly in front of her, she will actually look at them..

Ian.