The only problem with an electric gauge is that I've not been able to find one with more than a 90 degree sweep. Is there such a gauge and, if so, who makes it and where can I get one?

Mechanical gauges usually have a 270 degree sweep and, to me, are much easier to read quickly.

To answer rlekun's question, Summet racing has a braided line kit for mechanical oil pressure gauges. It's a little spendy, but still less than buying the parts seperately and then you have braided hose all the way from the engine to the gauge.

Ty