Yes you can do a Gryphon on the 7.3 though I would say the Phoenix or the FU chip option is the way to go.. also post specifics on what the things are that bugs your dad when towing etc... then we can better advise you what to go with and if standard or custom tunes will work best... not sure about Gryphon but with the Phoenix the "standard tunes" already have trans mods to them. Also if you do a lot of towing consider the Transgo standard or Tugger kit for the Transmission
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur
ASE Master Auto Technician
2001 Ford Excursion 7.3 4x4
Projects. 1970's Hustler and Max II Amphibious ATV's
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