67 Barracuda oil pressure gauge

It sounds like your oil pressure is fine but I agree with going to mechanical gauges ASAP.

When I was first driving my 69 Barracuda home after buying it the factory temperature gauge was almost pegged to hot. I actually stopped at a service garage to make sure everything was okay (false reading). Switching to mechanical gauges showed 185 degrees which is the rating of the thermostat installed.