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Post the VIN and all the codes found on the Warranty Plate, all can be decoded.

The Warranty Plate is either located on the left door face below the latch, or on the inside of the glovebox door.

An N Series truck is not considered a COE = Cab Over Engine, since the cab is behind the engine, not over it.

Looking for an F600? There's one not too far away. On Route 74 near Andrews NC is a black 1965 F600 Custom Cab dump truck parked on the west side of the hwy (opposite side of the river).

It's been sitting there a long time. I spotted it while driving the back roads of NC & TN recently.