If its a K code , it should already have disc brakes.
If it is a K code Maybe a previous owner removed the disc brakes and installed drums? but why?
The Kars only had disc brakes as standard if they were a GT. All other Kars had drum brakes unless they ordered them as a separate option. One of my Kars is a drum brake Kar and I have seen many others with drum brakes. The first time that I saw a Kar with drum brakes my thoughts were the same as yours.
-Fred-
Hi Fred, regarding the D stamped manual disc brake pedal which has a lower position stud on it vs drum brake pedal ,would it still use a standard strait master cylinder push rod thanks