It does sound like you need a new oil pressure switch Luddite with single pole two way contacts, assuming the wiring is intact.

The additional switch sounds like a good idea if your car is used infrequently. A push button momentary switch could be wired across the normal run (oil pressure present) contacts of the oil pressure switch. This would allow priming of carbs prior to starting providing ignition was in normal run position.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1960 Velocette Venom