I agree with Chuck. Mine has about 300Kmi, runs smooth & strong, and rattles like a diesel.
You can convert the original FAKE oil pressure gauge to actually work by replacing the sender switch with an old-style pressure sender (NAPA/Echlin PN OP6091), then jumpering the resistor on the back of the instrument cluster. (For a V8 engine, you'd also need a brass plumbing extension to clear the block.) These photos are from me converting my Crown Vic, but the parts on your truck look the same.

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