A Look Inside My Engine, How It Died.

Jeff, sorry to hear your trip and truck are ruined. 
And moreso the long term effect or issue of getting a new solution. 
You probably don’t relish my suggestions, as you haven’t in the past either, but your time with this truck is done. It was done a while ago but you’re resourceful enough keep it going every time. Just like you could now if you wanted to. 
But like before, it’s still the right time to cut bait here. Maybe slap a junkyard 5.4 in it to sell it, if that makes financial sense, but that’s it. This truck hasn’t made long term financial sense for a while. And the issue is the deeper you get into it, the deeper you get into it and the harder it is to justify losing what you’ve sunk into it. 
Trust me when I say this advice is coming from someone who understands the value of keeping old cars running and certainly understands the value of DIY repairs. Also from someone who knows enough to not get emotionally attached to a run of the mill piece of transportation and is almost allergic to spending more than necessary to achieve a goal. 
I may be presumptuous here but on the assumption that a new or very gently used truck is off the table financially, your best bang for the buck is finding a low mile grampa 6.2 Ford (since your a ford guy, although it IS the best gasser combo of the 2010s era, 6.0 Chevy coming in second due to early ford 6.2s being very overbuilt in their transmission selection.  
If you want a bigger truck, find a gasser dually although they’re pretty rare for obvious reasons.  
Don’t be swayed by the med duty bug.  Anything like that CV or similar is more of a challenge than it’s worth and basically a non starter for a truck camper.  
One of the biggest issues being you end up with an over height rig, by ALOT once you get a big camper jacked up high enough to fit over the cab.  Nevermind the full set of stairs needed to reach the door from the ground  Ram 4500/5500 is the only viable option if you can’t make do with a “little” 1 ton.  
Take any of these suggestions for what they’re worth  if you secretly like them, tell the wife it was your idea  and move on to happy er camping.  PS, the wife might also like you not having a backlog of “projects” and the lack of propensity for failure when out on the road.  Most wives don’t cherish those moments on the side of a road watching you play McGyver while trying not to get run over by a semi or stabbed by tweakers.  Fun fact, they put up with it and squeak out a smile as to not be rude  (actual story)  

Time to go truck and camper shopping!!!