1971 Plymouth Duster Ring and Pinion Set Dana 60 - Standard Rotation - Ring and Pinion Set - 4.30 Ratio - Fits 3 Series Carrier - Will Work w/4.27 in 4WD - Rear guaranteed to replace your current 1971 Plymouth Duster Ring and Pinion Set Dana 60 - Standard Rotation - Ring and Pinion Set - 4.30 Ratio - Fits 3 Series Carrier - Will Work w/4.27 in 4WD - Rear. 1971 Plymouth Duster Ring and Pinion Set comes new OEM 1971 Plymouth Duster Ring and Pinion Set aftermarket new 1971 Plymouth Duster Ring and Pinion Set of remanufactured 1971 Plymouth Duster Ring and Pinion Set Dana 60 - Standard Rotation - Ring and Pinion Set - 4.30 Ratio - Fits 3 Series Carrier - Will Work w/4.27 in 4WD - Rear.