I recently inherited a 1964 Buick Electra Convertible with the factory (but rebuilt) 425 cid and 2 4bbl carbs. It doesn't have air, it does have buckets but no console, column shift, black on black on black. My question is not so much what this car is worth because it is priceless to me but rather is it rare? How do I find out how many were made in this set up? Thanks,