OK, you might be missing my point and I apologize if I accidentally steered this to a 1/2 ton vs HD platform debate (but I bet your 6.0 PSD doesn't run on gasoline, either). It wasn't my intention to go that route. My point was intended to be: It's critical that the OP gives details.
It's undeniable that a 2019 3.5 EB HDPP F-150 is a completely different animal than my 2005 5.4L F-150. That's the point I was going for. Things have changed so much, that it's pretty important to list what the F-150 is.
Where you land on this poster is going to have a fairly significant effect on how the question of capability/capacity gets answered:
And, on the "Salem trailer," yeah ... details.
Here's a "Salem trailer":
Here's another "Salem trailer":