Dumb master cyl. question...

I've got a dual chamber master cylinder off an '86 mustang going under the floor of a '56 F100 running disc/drums. I made a diagram of the line routing when I took it off the mustang(and promtly lost it). It has a small chamber in the front, and a large one in the back. Which chamber is the front brakes?, and which is the rear? TIA, Matt

 

Larger chamber is the front brake...smaller is rear