Installing an Oil pressure Gauge

["Milotay, Mark ISTA:EX" <Mark.Milotay@gems5.gov.bc.ca>]

I was just wondering if what type of oil gauge (mechanical, electric...)
should I be buying for my '80 Spitfire, and will it just run off of the
connection that works the idiot light? I was in my local auto part store
at lunch today & came to the realization that I don't know how the oil
light works on my car (other than it is connected to the sending unit
on the engine.

Thanks,

Mark