Oil Pressure Switch/Sending Unit with only one prong?

[gordyzx9r]

I replaced my gauges with Stewart Warner gauges years ago...when I did that, the kit came with an oil pressure switch (sending unit?) that only had one prong for a wire as opposed to the stock ones with three prongs(?).

Where can I find one of these one prong switches that will fit a turbo regal?

My oil pressure gauge is reading 15 PSI low, which made Bill real worried until he hooked up an under hood gauge.

 

[gordyzx9r]

Here is a picture of the gauges

 

[pacecarta]

you need to get an oil pressure sender (its not a switch) for your gauge as they are gauge specific

try summit or call stewart warner

heres a link but no guarantee it will work with your gauge
http://streetperformanceusa.com/i-7279294-stewart-warner-fuel-oil-pressure-sender-1-8-npt.html
edit it says not available in that link seems to be an obsolete part

speedwaymotors has one