Poppa,
Just an update on your purchases. I just moved my Lance TC from a 2004 F-350 Crew Cab long bed diesel to a 2019 F-350 Crew Cab long bed gasser. I couldn't be happier. Bed capacity for my new truck is 6500#. NO porpoising (older Ford frames and other brand frames flex in the middle) and excellent cornering, etc. First trip was thru Colorado Mountains and zero performance issues.
Advice? Get Torklift tiedowns. Worth the cost. I self-installed the frame components but your TC dealer can do it. You do have to unhook the one by the gas tank filler to insert the gas nozzle, but it is an extra 10 seconds or so. No BIG DEAL.
I hope you have many years of enjoyment with your new rig.
Rick