Ford 6.0 liter

The 6.0 Had many many issues. There are a number of fixes that should be done to make it a bit more reliable. EGR delete this will require a programmer to delete in pcm, new head gaskets and apr head studs,stc fitting on hi pressure oil pump, updated stand pipes for injectors
My son is a ford Tech and just bought an 06 F250 4x4 that had all the fixes done to a new motor Ford replaced for previous owner also a ford tech. The previous owner did all the upgrades. If done at retail at the dealer would have been in the $6K range. 3 for parts and 3 for labor.
Do not put in a chip, leave the motor with stock performance programming.
Only 67K you should be able to get a warranty on it and that may be wise. Feel free to PM me and I will be happy to try to answer any of your questions.
Many have had them and had no problems while too many have had endless issues.
My advice is learn the history of the truck and make sure you are getting a very good acquisition cost.
Just my 2 cents. I have stuck with my 99 F550 with the 7.3 which is bulletproof. would love to have the newer 6.7 but not willing to spend that kind of money.

In 2004 I bought a F-250 with the 6.0 and it stayed in the shop more then it was on the road. I had so much trouble that Ford allowed me what I paid for it on a new F-250 in 2008. The 2008 had a 6.3 and I never had a minutes problem with it. I really don't know what to tell you except, that engine was a load of trouble. I also had a Class C motor home with a 6.0 and never had a problem. Some of the 6.0 were fixed and after that they were good engines. Ford finely found the problem and fixed a lot of them if the owners took them back for the recall. Find out if the truck was fixed and talk to the previous owner. The dealer should have his name on record. He will most likely tell you why he shed the truck.