Master Cylinder selection help

What to think about is volume. A smaller bore cylinder requires more movement to produce the volume needed to apply the pressure. It will have a softer pedal feel because it produces more pressure and you can push the pedal past where it is effective. A larger bore will product more volume with a harder pedal feel when it reaches the required pressure and volume. On a 69 Pro Street Dart I did was a manual brake I ran the 1 1/32" MC.

Food for thought.