I was just looking for info on the subject of rear barrel diameter on these wide angles but drew a blank.
I think I could have found this on the 'Cameraeccentric' website database, but it seems to be down - hopefully not permanently.
I think I have hard-copy at work.... but anyway.

The older Fuji 105mm f/8 SW in Seiko has 70mm OD which is good re. my ( modified ) Gandolfi which is machined to accept 70.

Did the later 'N' lenses with Copal with the 6/6 element/group construction have a larger rear barrel, or the same ?

The otherwise excellent xkaes Fuji database doesn't have a column for this parameter, unfortunately.