brake line/prop. valve question

[stallings.sean]

Alright, I got the car somewhat in the air and was trying to trace my brake lines. Im going to replace all the lines from master to wheels and am having some trouble figuring out what lines are for what.
I have 2 brake lines that go to the proportioning valve and there are 5 lines coming off the proportioning valve. Im not sure where those lead to. there is the top 2 from the master, there are 2 connections in the front (top and bottom). I assume that the top one goes to the front brakes and not sure where the bottom goes? Maybe the other front?
The back goes to the back brakes which then split off on the rear axle...is that correct?

Which leads me to my next question. There are 3 lines (not necessarily brake lines) under the rocker on the drivers side. One is a brake line, I assume one is a fuel line, and not sure what the other line does, it looks like its cut and not sure what it goes to. The car runs so its getting fuel so I want to say its not a fuel line. The vapor return line is on the passenger side under the rocker. I know its not the E brake cable. Can you please help me out.

Attached is a pic of a proportioning valve that resembles the one I have on my car, all the same inlets.

 

[stallings.sean]

Ok, so I did some thinking, Under the drivers side, is there 1 brake line that runs to the back, 1 fuel line, and 1 fuel return line? If so, I think its the fuel return line that is broken, not sure though,where would that connect on the engine/carb?

 

[pontiacgp]

the two lines from the master, front is the rear and rear is the front of the master and they go into the two top holes in the valve but the rear of the master goes in the top front hole and the line for the rear brakes goes in to the top rear hole. The one at the rear of the valve goes to the back brakes and the angled one in the front top is for the left front and the other bottom front hole is for the right front brake..