instrument voltage regulator

Mike69cuda said

Neither are a drop in replacement for a rally dash. You need to do some mods. There are a bunch of threads on this.

I have used both of the ones in pictures below. They are both from Amazon. One is adjustable & one is fixed 5 volts. These are easier to use than a 7805 if you are not good at soldering.

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I did this a while back and could have sworn that all I needed to do was bend the little arm inside the fuel gauge back so it would no longer make contact. Then all I needed was to make a little wire jumper that connected onto the IVR spade connection and had a ring terminal on the other end of the jumper that went on the back side of the fuel gauge mounting post.

Also I think if your fuel gauge internal IVR isn't working, then all you need to do is connect the IVR to the post and you're off and running.