i am a paramedic and at work we have 4 new trucks, each about 1 year old. 3 of them have the 6.0 liter.
I was never a big fan of the 7.3, but that motor is far superiour to the 6.0 in nearly every aspect, including fuel economy, power, and reliability.
we've sent all of out 6 litres in for repair several times in the past year. We've replaced among other things: a set of heads, a turbo, wastegate, head gaskets, injectors, cooling fans, some fuel pump parts, lots of A/C fuses. 1 of our trucks was at the ford dealer for 2 months during the removal of the heads and injectors.
The guy who delivered our rigs stated that the motor in the ambulances creates 100 hp less than the pickup truck motor, and far less torque. Good thing! We can't keep these thigns running even in "low power" mode. can't immagine trying to run one that was modified!
did i mention they new trucks get about 8 mpg while the same size rig that is one model year older (with the 7.3) gets 12mpg.
Quis custodiet ipsos custodes (who will watch the watchmen?)