B7 Blue 340 Duster 1971?

The fender tag shows A09 and the build sheet shows A09 as well. The sticker in the door jamb shows 10-70. I was just trying to see what number my Duster 340 was off of the assembly line. I thought the 175022 part of the vin was it but learned that it is just the number of all the cars built at that plant. Any other info would be great. Thanks.
Mike