MC Pushrod

I have a 71 Duster with manual brakes that has been converted to front disc brakes from a 73 Duster. I am in the process of replacing the master cylinder and noticed on the old one the pedal pushrod is connected to the master, but on the new one it is not. I ordered a master for a 73 Duster with manual front disc rear drum brakes through rock auto. Any ideas thanks.