For peace of mind you should probably hook up a mechanical
gage to your block (unscrew the sender and tap in there) and
measure the oil pressure: (1) cold idle, (2) cold 2000 rpm, (3)
hot idle, (4) hot 2000 rpm. Then you can reassemble your
electrical oil pressure sender+gage and confidently know the
correlation between the real pressure and the in-dash gage.
The OEM gage is notoriously flaky but I would not run without
any indicator of oil pressure.
Turns out mine was disconnected at the sender unit. It was loacted next to the Oil filter on the passenger side. The mechanic who told me where to look for it said if it still didn't work, that I could ground the coonection that is suppose to go to the sending unit and if the wiring and the gauge are working, the needle would peg. Fortunatly, it was just disconnected.