Well like has been said already it all depends on the quality of the gauges and senders. I still have an old set of Stewart Warner mechanical gauges from 1977 in my Savoy and I trust them and maybe that's why I still have them in the last 6 cars I've owned. If I were going replace them it would be VDO gauges senders Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60