yes and yes. The 03's ran like SOB's when they still had their factory programing. They got pretty good mpg aswell. I think you'd be very happy with a roll back and a FICM tune, or at least putting an economy FICM tune in the truck, vs the atlas 40 or A80.
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19 F-350 6.7 Auto
16 F-350 6.7 Auto
05 Excursion 6.0, Auto, PHP Atlas 40 FICM, ARP Studs VXBC6(truck PCM)
00 F-350 7.3, 12 Speed, PHP Gryphon, PHP hydra, DAC3
95 F-Superduty 7.3 DI, Auto, Mechanics Truck
94 F-Superduty 7.3 DI, 5 speed, Flatbed
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