Maybe inspect the throttle body or pids. I don't remember if you can drive a 6.4L with the throttle body disconnected, may have trick the PCM into thinking the throttle valve is still connected.
Maybe monitor the fan clutch or drive with it disconnected???
I find TSB 08-16-02 interesting, I don't know that I ever thought about updating an IC at the same time as the PCM/TCM.