Dual Master cylinder distribution Block diagram

I have Installed a new Distribution block on My 66. Swapped from a single Master Cylinder to a Dual (Manual Drums) I am not sure about the lines going to the brakes. I bled the system and then my Pedal became rock hard . At first it bled out OK then It wouldn't bleed down at all with bleeder valves open. Now i am not sure I installed My Lines correctly. Can anyone post a picture or Diagram of the lines to the Block.
Do the rear lines Go straight through the Block front port to Rear port? The front master cylinder is going to the first port on top ,passenger side front to the side port on the block ,drivers side to the port on top of the block right behind my Master cylinder line. Do I have the front & rear swapped ?