Thanks to all for the information, I was hoping to avoid running thin vacuum hose around the engine and through the firewall (last experiences with that was 30 years ago with my modified Gemini, and it always had kinks in it), I'm sure technology has caught up and I can buy "kink free" vac line...

Have looked at so many different gauges, Redarc are Frigging expensive, looked at some Mcnally ones from the states, but with the current exchange rate the price isn't much different to Redarc, what put me off further was at the Mcnally checkout they want ed $91 US for postage.

Was almost tempted by some prosport ones, but since I'm getting a two gauge pillar pod, thought that at least with the Redarc it's a multiple gauge and when I can afford it can get another to fit in the pillar pod, oil pressure, temp, volts etc.