Here’s another clue to the problem. CHECK GAUGES light comes on and oil pressure drops. See picture
You must be registered for see images attach
You must be registered for see images attach
Man I have this problem ever since I got the rebuilt motor. Dummy mechanic blamed the guage. I swapped 2 sending units and new after market guage. All the same readings. Morning and first start, Had good pressure. Running a while, it would drop to low pressure. Finally just unplugged the guage and driven it sense. My guess is the pump or bearings . But gonna waiting til it gets worse. Before I deal with it. Really want a 383stroker lol