Instrument Voltage Regulator for 65 Dart

I've updated my 3 1960's Mopars. Last pass, I used a ~$10 adjustable one from Amazon like Mike69cuda shows. Looked almost identical to a "Plymouth Voltage Limiter" I bought on ebay before. Adjustable lets you tweak either the fuel or temp gage to read perfect at full-scale. There are also screwdriver adjustments for zero and range on each gage (experts only). I had to add parallel resistors (~20 ohm) across the fuel gage to get it to the needle on "F" with my new fuel level senders.