Re: Dodge Penthouse on a Ford?
Anything is possible. It won't be a direct swap. Most roof racks won't even fit between the two vans. The Dodge roofs are a little narrower, but they are also simple rectangles. The Ford roof perimeter has curves both in elevation and side profile. And roof profile itself is pretty different too. But I suspect you could make it work after some trimming with a die-grinder.
2000 E450 dually V10 wagon