Yes I know about the Holley EFI gauges. I have some of them on hand but I haven't used them yet. I might build myself a small gauge panel just for fun and hook them up even though I don't need them in this car. They are cool since they daisy chain together. It only takes one wire from the ECU to run all of the gauges.
https://www.holley.com/products/fue...es_and_displays/analog_style_efi_gauges/