Andy, I'm sure you are aware of these but for anyone else that might be interested, Holley makes "can-bus" style stepper motor gauges that look like traditional after market gauges but work with the Holley ECU. The gauge housings are slim depth so they don't take up a lot of real estate behind whatever panel you would use to mount them. You have to get a gauge module to drive them but the individual gauge wiring is really simple since they use audio jacks to daisy chain them together.
I have a set on order for my in-process Sniper EFI '68 Coronet to replace the factory gauges. The auxiliary gauges (2.062" water temp., oil press., fuel level and voltmeter) are $125 each though the electronic/GPS speedos and tachs are more. I generally prefer a more traditional looking gauge but these are OK. They have replacement bezels if you want to change it up.
