I believe so, the B series engine came with a BW35 in the auto versions of the Farina-styled cars such as the Wolseley 16/60 that donated its motor to the A40, the A40's tunnel is only screwed to the floor so if the auto were too fat for the floor, a little bodgification should allow everything to fit. I know a fella who has a 2 litre Pinto and C3 autobox in his Somerset but using modern Ford parts wouldn't be my preferred way.
But I'm not after that much work to do if it can be avoided, so please, Rich, stop putting such damned sensible ideas into my head!

I'll have my rare, weird aircooled piece of machinery one of these days and Reliant taxis pop up through the kitten register's magazine and website from time to time, one of which would do nicely for the time being..
Oh go on then, it can't hurt to have a drive down to Leeds and try the Somerset on for size. What's the worst that could happen? Even if it's right across on the South side of the place, it's only a 270 mile round trip, which would give me time to listen to an entire Molly Hatchet album at the appropriate volume level.
Molly Hatchet doing what they do best, just please don't read the comments after the video. I hope the poor guy finds his watch

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https://youtu.be/TuleyEEgAtg