That looks like plenty of room to me, rack and dynamo mounts may indicate touring but despite or with the short couple, the French have a long tradition of combining multiple disciplines which they excelled at so this may be a later production effort to keep them going.
Brevets, Paris brest Paris, Concours de machines, Audax, etc.
I have several tandem frames now, none my size but if yours turned up here I would be all over it, I think its fantastic.
And still holding out for a Paramount tandem but they seem to be scarce in lady back medium and XL captain.
