That block that you are referring to is attached to the bed. It is 1.5 x 2.75".
The bed is 39.5" wide.
THAT is why it doesn't fit in the Ford! All of the other penthouse beds I've seen have the plywood base sitting directly on the angle frame. You effectively have nearly an 8" thick bed with those rails attached.
2009 Express AWD, CCV Top & 50-ish home build. Daily driver/camper/kid hauler
Try listing on San Diego, Orange County, and LA craigslists. Lots of ford SMB vans in the area, maybe someone needs one?
Goognlck with sale.
"Ford sportsmobile 4x4 camper van pop top bed" should hit most keyword title searches.