Are there any special dispensations (or penalties, for that matter) for old cars in France?
Here in Victoria, if you are a member of a registered car club and your car is 25 years old, a permit is available for up to 90 days usage for one-fifth of normal registration fees. As long as the club deems your car roadworthy, running a LHD car is not problem. You just have to keep a log and unfortunately, run a club-permit plate instead of a standard plate.