As a former owner of 6.7 Ford, I recommend you stick with a DuraMax. The 6.7, while "maybe", a bit better than the previous post 7.3 diesels, has not been fully vetted. Many owners from the Ford forums are reporting they are considering dumping their 6.7's before the warranty expires.
The 6.7 HPFP problem, while relatively small in numbers, strikes without warning and takes out the entire fuel system. The cost to repair is over $10,000.00 and Ford requires Field Service Engineer(FSE) inspections on all HPFP repairs...and warranties are denied until owner can prove he did not cause the failure.
The Diesel Fuel Conditioning Module, fuel filter assembly to the wondering, is about useless. It does not trap emulsified water and requires almost 8 ounces of water in its trap before it turns on the Water In Fuel(WIF)light. If you do get a WIF message, and your HPFP fails, the WIF event has been recorded in non-volatile memory forever and your warranty is gone.
Keep in mind that in the Bosch CP4 world, all manufacturers are seeing above normal numbers of complete HPFP failure. Porsche uses the same pump in their expensive Cayenne SUV.Prse has publicly stated that the CP4 is "delicate". Audi uses the CP4 in their diesels as well. The y called the pump fragile. VW, the nexus of the ongoing NHTSA investigation into CP4 pump failures, has settled with NHTSA for the time being. They were told by NHTSA to either fix them all to 100,000 miles with no questions asked or face recall on them all.
Then, we get to GM and Ford. They use the same Bosch CP4 pump. Their answers, under oath to the NHTSA, show nearly identical failure rates. They numbered in the hundreds for each manufacturer and that was over a year ago. The difference, GM has warrantied all of their failures...Ford routinely denies their failures. This is indisputable...just look at the Ford boards and the GM boards. Many complaints about Ford warranty...when the Moderators leave them up and not one complaint anywhere about GM failures...
All in all...Too many negatives for me...I traded mine for a DuraMax...very happy...
Regards
Ricatic
Debbie and Savannah the Wonderdachsund
2009 Big Horn 3055RL
2006 Chevrolet Silverado 3500 Dually LTX with the Gold Standard LBZ Engine and Allison Transmission
2011 F350 Lariat SRW CC SB 4WD 6.7 Diesel POS Gone Bye Bye