Duster Twister

Back in 72 I bought a new Duster Twister. It was a 318, 3-speed. It did not have the sharktooth grill. It did have the strobe blackout on the hood with no scoops. It had deluxe vinyl bench seat, manual remote mirrors, ralley rims without trim rings, Twister side stripes, and not much else. Less than a year later it received the 340 motor and 4-speed from my 70 Duster which by then had a 440.