Coming from ford and the forums the 5.0 has been a hit or miss failure with multiple issues, ticking engines, blown seals and other oil leaks. The 2.7? even before they updated to port injection the older ones were turning 200k and chugging along. Reached 200k miles in my 2.7eco - Ford F150 Forum - Community of Ford Truck Fans
The guys on that F150 forum are somewhat surprised at him getting 200k out of the 2.7, as I read it. Plus, the guy this link goes to has replaced 2 torque converters so far. I had to stop reading due to time.