The only difference is wheelbase, 15 inches in the bed and 9 gallons in the fuel tank. It is not a special order configuration, it is just an order. Nothing special about it.


Rare? Probably, but rare does not always mean desirable. One of the rarest production Chevrolet Impalas from the early 1960's was the 1964 Impala SS with a 6 cylinder engine. Just under 2000 were made. They are as rare as hens teeth these days.