I purchased the Kirkham voltmeter to replace my original Superformance-supplied Lucas ammeter, and the Kirkham fuel pressure gauge. They were easy to install, the wiring was basic and simple. While not quite exactly identical to the remaining Smith gauges, they are close enough it isn't noticeable. Their appearance may even be an improvement....and the lighting is definitely superior to the Smith gauges! I purchased them thru the Kirkham Gauges website advertised here on CC. Definitely a good purchase.
Rodger