My EGT probe is pre-turbo, I run ~600 ish cruising flat ground at 60 mph. Truck has the aerodynamics of a brick and tires more suited to offroad use than low rolling resistance on pavement.

Pulling a hill at WOT while hauling a load, it can get to 1100 easily and then holds there.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap