I am researching the additional components to complete my braking system on my 29 roadster project. There will be drums full circle on the vehicle(buick fronts, 9" rear), but would like some help in understanding the how's and why's regarding the selection of a master cylinder. Several people have said to run a 1" bore; but I ask how, does one know the proper bore size to use? I have searched for this discussion, though I cannot find such a topic. Could someone identify different Drum/ Drum brake system requirements and the different styles of master cylinders used?