The rewind shaft bush is different it is longer for the concentric dials of the exposure meter calculator and variable resistor. I think you could shorten it with a saw, it is easily removable, from the chaiss of the camera. The rewind shaft would need to be from a meter less camera as it is also shorter, as is the knob. The front plate may need to be bent a little which only needs care.
I thought the meter was totally ugly and horrible but it works (or should work) really well, so I'm happy with mine, the extra bulk I can live with. My other selenium meters tend to die but my '54 still operates really well. The metered cameras tend to be cheaper, I like that... ugly perhaps but they are not female photo models, except on this site?