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The biggest physical difference between a Ford 6.0 and 6.4 besides 24cid are the number of head bolts/cylinder. The 6.0 has 4 while the 6.4 has 5. Stronger +/-$500(depending on where purchased) ARP 250-4202 Stud Kit kinda fixes that - heck, I have several hundred bucks worth of ARP fasteners in the built 5.0 in my '31 Ford, keeping it together When I was in the market for a new truck in '06, opted for the V10 gasser instead, just because of the various problems from the head bolts to EGRs and several things in between. I have to say that the 6.7 does it better, no matter what you are using it for. I suspect the GMs and FCAs will do it just as well.
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Dave W
2014 Montana High Country 343RL (Sold!)
2011 Ford 6.7 Lariat CCLB (Went to PU Heaven)
2019 F150SC XLT SE Sport,w/full tow package
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