Now that I am running after 12 years I already need to pull my Instrument Panel on my ‘68 Polara. As I posted on another thread I was getting some pretty large bounces on my fuel gauge and Temp gauge. Both which are fed from a voltage regulator limiting to 5 volts built into the fuel gauge. I did notice the bounce when I bench tested, but wrote it off to my cheap power converter. But I don’t think that was case. Per some forum wisdom I ordered a solid-state 5 volt regulator. But it requires the old voltage regulator be taken out of play which means the IP comes out. I am going to test on my spare panel and gauges first.