Especially if you're tall, check out the Chevy chassis'd units. They have better leg & foot room, and are much more likely to drive well out of the box.
If you do decide that a Ford will do, consider a change to Bilstein shocks even if it's new.
Whatever you get, set the tire pressures according to the _loaded_ weight, _not_ the sidewall label; it's for maximum load, and says so right there in smaller print.
Jim, "Let's don't waste time with finger-pointing. I already told the boss that it was your fault."