In 73 they still manufactured a few 489 carriers fitted with the older model pinion 1-3/4” instead of the 1-7/8” that usually comes with the 489 carrier. Any part numbers you can give me would be greatly appreciated
In 1974 a Duster would have an 8 1/4 axle. Any numbers on a factory build sheet will be the end numbers for a 8 1/4. The E bodies and some B bodies had the 8 3/4 in 73-74.