I have a 2023 SPF gt40 new build. Engine is a 351w with Holley 8 stack EFI. Ignition is a Pertronix. The tach does not work . If I connect a 30 year old tach I have on the shelf to the smiths tach wiring connector it works , but the factory one does not. Does anyone know what the 8 switches on the back of the smiths tach should be set at? There are 8 switches with either on or off. I assume it needs to be set for the Pertronix ignition?