Rusty, I think it depends on what your sytem is based on.
Mine uses a
Corvette style unit and bearing in mind it is reversed from the way it would be in the car.
Master Power Brakes state that the front port, furthest from the pushrod is the front circuit.
As you will see from my pic,I had to get 'creative' with the brake pipes.
It
is important they are oriented correctly.
This is obviously something to do with the way the piston operates within the cylinder itself.
Here's a link showing some of the more common
Master cylinders. I hope this helps.
Jock.
