I have a 52 Super, I would bet the headlight switches work the same. It has six positions rotary turning. Turning the switch counter clockwise completely to the left 1st position no dash lights nothing. Second position turning right map lights, third position map lights brighter, forth, fifth and sixth positions are different brightness of dash lights clock included clock. It was necessary to turn on the parking lights or head lights to get the dash or map lights to function. My dome light is controlled by the doors or by a switch on the 'B' pillar behind the driver seat.
Cars that had mechanical head light switches of the 70s and 80s had a switch that when turned it dimmed the dash lights and another position to control the dome light. I think a modern switch would work for you using the dome light terminal to control the map light. You would have to play with the new switch to figure out what each terminal was for to hook up the proper light to it. You would also have to fit your dash knob(that would be the difficult part). But I think it could be done.
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