I haven't done the swap myself *yet*.
I know Seon has done this with a 1-ton.
According to my fuzzy memories talking with Seon, most of the work will be in making frame mounts. That's assuming that you can hold up the cab and box overtop of the donor frame while you make custom mounts.
I will have to make a tech tip on this procedure once I get around to doing it.
The key thing is that I've seen it done several times in the past and that gives me confidence.
So, if someone else can do it then so can I! :-)
Zeke