'73 PLYMOUTH DUSTER DRAG CAR

Info was incorrect. It has a Dana 60. I will try to edit the post. Need to figure it out.
Hello, you can tell I am new at this. I was getting info from fellow club members and according to my son, it has the 8 3/4. Sorry! :) Also, additional info about parts Dave purchased for the car:
HAVE RECEIPTS FOR THE FOLLOWING ITEMS:

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