Up grading to dual master cylinder

[Mart]

This is just my opinion but you are probably better off maintaining the existing setup. This has been discussed many times here. The ford pedal has a limited amount of stroke due to the through the floor design. Modern cars with swinging pedals have a lot of extra stroke available as the pedal swings under the dash. (some may differ). The chances are that a dual master cylinder, if one side fails, would need more stroke lower down than the early Ford pedal can supply.