You remove the electronic sending unit, install a 1/4" NPT "T" then re-install the sending unit and a mechanical oil pressure gauge, probably the easiest thing in the world to do and completely unnecessary as there is little you can do about the oil pressure anyway.
If you have driven a FORD product in the last 25 years and thought it had an oil pressure gauge you have been fooled all FORD products only have an idiot light switch connected to a gauge, if you look at a FORD oil pressure gauge it stays exactly the same, hot/cold idle/max RPM
So even the FORD engineers think an oil pressure gauge is unnecessary, only the marketing folks think so.
SO in conclusion just drive the dang thing and use the oil pressure gauge as a relative instrument, if it changes then there is a reason to check into it.