10" backing plates???

Most any car with 10" drum brakes. Remember, an 8 3/4 is easier because the axles just unbolt and slide out. Any 1966 and up a-body, b-body, e-body, c-body, even newer Fury, Volare, and Diplomats should work. You could also look for some backing plates on ebay or post a wanted ad on this site for some. All the other parts can be purchased new, including the drum. You can also go with 11" inch brakes, you can find them on c-body cars, cop cars, and hipo mopar cars.