Kelsey Hayes disc brakes

Of course not (there is no different PN). Didn't I tell you that the rest of the brake system doesn't care whether the MC is manual or power-boosted? All it does is make hydraulic pressure. The rest of the system doesn't know (or care) where that pressure came from.

However, good that you asked since there are subtleties to know. For example, a disk brake MC needs a larger reservoir for the front hydraulics (so it doesn't run low on fluid over time).

Not always true!! The early cars with K-H disc did not have the larger reservoir for the front discs! My manual disc 66 car uses the same master as a 69 Dart manual disc car, which has the same size bowls front and rear!