Townie the pics show a 71c all C boxes have that sort of shift design
yet they all vary internally with even alloy sandwhich plates on the
pintara ca20 while cast iron on the CA8de and T boxes.
On a light datto either ones are pretty much stronger than abused boxes
from 6 cylinder engines but you can be lucky with a low kms one.
The maddat price is pretty good for a guaranteed box with no hassles but
if you blow it up then you will be in strife finding a replacement while
the long boxes are very common and attainable.