Compatibility between power and manual disc/drum master cylinders

Alright, I'm having a hell of a time finding the correct rebuilt MC for my car. It has KH power front discs and rear drums. I can't find the correct MC at local parts stores, and am on my second one from rock auto. The first they sent me was manual drum/drum and the one I just received is manual disc/drum. Will this work on my power brake disc/drum setup? Any other recommendations for a better MC to avoid this hassle?

Any help is appreciated. Thanks all!

Ohhh, and here's a shot of the MC I have:


...and this is the one I received: