I would like my interior to look stock and have not found a good location for my boost gauge.

Thinking now about replacing the stock oil pressure gauge with a boost gauge.
This is much like mazda did on the late FD series, with only an oil warning light.

In addition to the stock low oil level warning I would prefer to also have low oil pressure warning. I assume that it would be possible to mount a pressure switch in place of the pressure sensor, and have the alarm on the low level alarm lamp.

Anyone done this or have helpfull input?

Thanks.