My Dart is a 1971 GT and as such has the "A65" code numbers on the fender tag. You're right, the GT meant the buckets and center console were standard on these Darts, as opposed to the Swinger package which has the bench seat and column shifter.
the console would still be optional and extra cost .......there is a 70 GT locally that has the standard bucket seats .....yet has the auto on the column bcoz the original purchaser did not specify or did not want to pay for the console.