I like it too! I was also new guy here a couple years ago, but 40 years fixin up old ford trucks. I'm really glad I found FTE. None of my friends on Orcas Island understand me. Now I found some friends I can relate to.
It is possible the frame was cut. The ends look a little ragged.
but do not think the suspension has been moved.
Not familiar with the panel truck door of this vintage but the front and rear doors have the same shape. Guess it is possible the original manufacturer could have used readily available parts as opposed to fabricationing. Would make sense for replacement in case of damage.