SMB Penthouse roof

[hava98]

Hey all,

Just joined the forum to indulge my growing obsession with home-built 4x4 campervans. After considering my intended use and available options, I've decided to go with an early 2000's Ford E350 EB as a base.

Sorry for the noob question, but is the SMB Penthouse footprint one-size fits all? Or does the size of the footprint depend on whether it's a RB or EB?

I'm trying to understand whether there is room up there for the Penthouse, plus a roof vent.

Thanks in advance for any replies.

[LenS]

RB penthouse is shorter then the EB.