Here is a great conversion.
This is one I saw in a magazine back in '71 or so, and always wanted a picture of. The guy removed the back section from an early '60s Ford van, and welded another front in its place. I loved it because I had one of those, the first 'car' I ever owned.
This guy took the idea a step further.
And somebody else did the same with the 'pickup' variant Ford made for a couple of years.