Hello to all, I have a 68 300 with factory disc brakes. I would like to replace my rotors with new pieces. I know they are nonexistent. The original 66-68 rotors were two-piece in design. 68-72(?) were one piece in design and I can get those NORS. The bearings listed for both are the same parts. Can anyone tell me form experience if I can use the later rotors? Thank you, Tom