Hi, I am considering using some Delta award miles to fly back to the US from South America later this year. Aeromexico is the SkyTeam partner showing availability. The flight from South America to Mexico City is on a 787-8. When I look on seatguru, ir says that the seat pitch is 60 inches; by comparison United BusinessFirst seat pitch in a 787 is 78". Does this mean that the lie-flat bed on the Aeromexico flight is only 5 feet long, or am I misreading something or do they tilt their beds versus having a true lie flat seat? As someone who is very tall, this is a key factor for me. Any help appreciated.

Thanks.

John H