uugghh... i hate when people say this.
these motors have tons of issue STOCK... "modding" these pieces of **** actually makes them better! There is a reason that the 03 and 04 6.0s almost bankrupt ford. My "advice" on this engine would be to sell it! With that all being said, these things can be very awesome trucks when done up correctly. They can make some great power and are super smooth AND can be reliable after they are built correctly. If i were to buy a 6.0 stroker the list would be as follows:
Arp headstuds, oem headgaskets, bulletproof oil cooler, custom tuned ficm, keep the stock intake system, 4" turbo back exhaust, egr delete, sct tuner with innovative diesel tunes, edge insight cts for gauges and a garret 38r.
This guy hit the nail right on the head