'66 Valiant Brake question

Not worth the trouble ? I wouldn't put all sorts of time effort,and money into a 53 year old car and drive it with a single master cylinder.There is a good reason the govt mandated that all cars and trucks have dual master cylinders in 1967. When one of those rubber hoses breaks( it happens ) or a wheel cylinder fails ,or a line rusts out or develops a leak because it is rubbing on something it shouldn't be in contact with your pedal goes to the floor and if your out on the road you crash ,with a dual you only lose half yoyr brakes and can stop ! Don't cheap out and get lazy,you'll regret it if it fails and you lose your car or worse.