Hi Steve,
Like neither of the above.
It had a COE cab with the back cut out, then the straight sided part of a panel truck without doors or windows, and then I think it had another cab with doors at the very back.
I could see it from I-64 near Waynesboro VA, it was interesting, but looked unfinished, and overall it had an unprofessional feel to it, that's my 200 yards at 70mph opinion.
The ones you posted pictures of seem a lot more professional than this one was.
The other thing that I think really took away from it was the extremely long wheelbase, just guessing, but about 10' of cabs, and room for a 12' or 14' flat bed.
Cosmo may have a better recollection of it, as I am sure he has seen it beside the interstate.
I don't remember seeing it for the past few years though.
Grigg