Impressive what you can tell about the engine from just one plain picture. Especially the carb, as it'* mostly hidden below the airfilter.
Chances are i will keep this engine-carb combo as it is, unless something is seriously broken and needs to be replaced. I already got a bigblock 70' Challenger as a sportier ride, so don't need the Parisienne to be a powerhouse.
You are absolutely right on the interior. I'm planning to go for all black vinyl here, with a classic large two spoke steering wheel. This should bring the right feeling back.
The body will get completely stripped off all paint and rust. Also a rear-hinge conversion (suicide doors) for the two backdoors would be cool. Same as the 60s Lincoln sedans have them. Getting the hinges is not a problem, but modifying the locks and doors handles might be.