Hi Happyhacker. At risk of getting my wrist slapped, can I suggest that you google Talbot owner's club, and join their forum?
The knowledge on there about our vans is phenomenal.
The base van is also known as a Fiat, Peugeot, Citroen and Talbot. They are all the same except for badges, and they all rust as you watch, and all in the same places, mainly around the lower edge of the windscreen.
Re mechanicals, they suffer from weak synchromesh on 2nd gear, making it difficult to select 2nd on the move, and the gearchange is absolutely awful!
My own van is a 2.0 litre petrol panel van conversion, as I do not like diesel, but whatever body style you have, the mechanical bits are all the same.
Mine is also low mileage, but 2nd gear is shot, and I'm awaiting the opportunity to get it repaired by a Talbot gearbox specialist in Somerset.
I've already had the gearchange done.
Lovely old vans, quite pleasant to drive, but won't break any performance records, but they're fun!
Enjoy!!