10" drum brakes for early 7 1/4" rear

this set of drums, backing plates, shoes, hardware, etc is from the 7 1/4" rear from a 1968 dart 273 car. they are 10" diameter drums for a smallbolt pattern installation. the stuff is used but came from a running car. The rear they came from has the small bearings and only has four bolts securing the backing plates to the housing. Maybe someone could use these to upgrade a /6 car with 9" brakes to 10"? Cost $20 plus Shipping (probably about $20 shipping depending on location ) for a total of $40.