I like the multiple senders idea.... you could put them on a rotary switch. Another peeve of mine is that most of these older chevies with gauges do not also have warning lights and buzzer. This is easy enough to fix using an electric fan thermostat sender in one of the spare bung holes. I like these senders because you can get one that turns on as low as 200 degrees while there's still time to ponder your next move before the thing is cooked.