I've got an 03 with the 6.0 and 215,000kms.
It has a 4" exhaust, K&N intake, and a Hypertech.
It will totally destroy my 08 with a 6.4 and an Edge w/Attitude programmer.
I would recomend a custom tune over an off the shelf tuner.
I just got an 03 F350 with a 6.0L.
It is suffering from stiction. Runs if I plug it in but is really unhappy if left alone.
It has an older Hypertech tuner with the knob on the dash that says Hypertech Power Tuner and the numbers 0 thru 3.
Anybody know how to unplug this to put it back to...