respecting your elders

I don't know if the old man is right or wrong, but i bought a 1970 duster in 1972, it was a six pack, have no ideal if from factory or been added, l i drove to Indianapolis from Tennessee to buy the car, six pack was not on written on car, also had a 4 speed in the floor, but was not a Hurst shifter, but i added one, the car had about 20000 miles when i bought it, I know the challengers came from factory with six pack carbs and darts had wedges from factory, but on rear quarter panel where everyone is putting 318,340,360,440 and so on, i never saw any of that on any dusters in the 70s, saw the wedge on hood, and six pack on front fenders of b bodies, but had duster symbols on side and plymouth on trunk lid or on hood which were small chrome.