Brake mods??

70dart manual front disc drum rear
Remember reading that the stock rear drums had a tendency to lock during hard braking. The cure was supposed to be get a 15/16 rear wheel cylinders as replacements for stock (I think it was from a 70 D100) and add a proportioning valve and adjust to 70/30 or so. I will eventually update to large bolt pattern so I need this as a safe quick fix. Your impressions please???