I don't know what you call them on disc brake set-ups but they would be backing plates on drum brakes. I'm converting from drum to disc on my '69 and I have new lowered spindles in fact I have everything but those "pie plates" or "rock shields" (do they have a real name?) Help!! I tried the dealer they don't want to be bothered. Junk yards want to sell the whole spindle and rotor assembly. Someone out there has a nice set collecting dust in the corner of the garage. Oh yea I need them for a 1973 through 1977 spindle.