Ok..I have a 1970 barracuda,it has disc on front,10in drums on rear..I dont have a clue what it came with factory,I have rebuilt rear drums,all is fine,then I order new front disc for 1970,same bearings that came out of rotors then the seal area on rotors are smaller,I cant get a seal that works,the only seal that fits the new rotor is too small inside diameter,question is,could someone have installed rotors for a 73-74 before I got it? I guess I need to know the difference in spindles for 70-72 vs 73-74