Well, as cstreit mentioned, it was a beautiful day in Chicago yesterday and I used that to wash and wax my 83 as part of prepping it for it's return to service. But I didn't have time to do the interior and just got to it this morning - only to discover that my car has developed the same problem as Lendaddy's! The passenger-side rear carpet has developed mold, and a little along the carpet at the door sill as well. I'm wondering if I can get a progress report on the solutions recommended here.
As an aside - man, do I suck at car storage. I did the engine stuff okay - it turned right over and runs like a champ. But I'm amazed how dry the leather got in 3 months! Both the driver's and passenger's seats are a little cracked now, and this mold thing. I actually might have been better off driving it all winter, salt and all.
Emanuel