Are you talking about ten inch brakes on a Dana or 10.5 inch brakes on a OEM factory stock Dana 60 ? I don't remember seeing any 10.0 inch brakes on a E, C or B body after 1966 Maybe my mind is not remembering correctly now I'm thinking my 1970 V code Charger with the stock Dana had 10.5x2.5 on the back with disc in the front. It did not have the heavy duty brake option, 3x11 on the rear