Are you sure you got the wrong parts?...According to Rock Auto the 7021 and the 7023 are for Disc Brakes???? I would be interested, but those are for a disc brake application. My 65 Barracuda has drums.
Norm
The spindles that came in my brake kit match up to the 73 & up ball joints. I'm sure there are other kits that will work with the 7021 & 7023, but not the one I have.
