[Jacksonlll]

The gaskets have nothing to do with the pump putting out high pressure. It’s a positive displacement pump and if the gears turn, the oil goes up. If that flow is restricted, the pressure will go up until something let’s go. Look for a restriction down stream of the pump output. Take the plug out and crank the engine with the key off. Oil should come out slowly if the flow is not restricted. You should be able to hold your finger on it.
It should shoot out if all the flow is coming out the plug hole due to a restriction. Good luck and let us know what you find.