Dual Master Cylinder Conversion All Drums

If I'm using all manual drum brakes, I think I should be able to run one line from the master cylinder direct to the rear brakes (which is then split to each wheel at the rear distribution block).

For the front brakes, I think I can run one line from the MC to a front distribution block which is then split to the left and right wheels.

I think I can use the original distribution block and obviously plug the rear hole (which I no longer need).

Is that it? This sounds too easy.

What dual master cylinder (brand or website) do I use?

Thanks for the support.