What a damn beautiful car. If I was new car shopping in 1971 or so, there's nothing I would have picked over a Duster like yours. Drive in good health, sir. And of course, you can't go wrong with Mopar Rally Wheels.
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BBP Jegs wheels. 15x8 with 5.5" backspacing and 255-60-15s in the rear, 15x4 with not enough backspacing in the front and have 185-60-15s on them.