65 Valiant 1 to 2 port mast cyl conversion

My 65 Signet has the entire set up from a 72 Duster. I got the BBP wheels disk brakes, proportioning valve and the master cylinder. It bolts right up. I was thinking of trying to find a factory power brake braket from a 64/5 and try and make something work...... The duster power brake wont bolt right up or it will but then the MC is right next to the exhaust manifold