Single to dual master cylinder conversion

The single reservoir master cylinder on my 64 imperial is leaking, for safety sake I want to convert to a dual master cylinder while I'm at it
I understand a 67 C body for drum brakes is a bolt on item, and that it's a distribution block not a proportioning valve, so i can plug the hole for the back brakes, and connect the rear line directly to the master cylinder, does this sound right?
Here is where I've gotten my information...

Single to dual master cylinder conversion