Yes you will have to change the mater cylinder,  rear drum brake cylinders have a valve to keep a slight pressure on the rear wheel cylinders , if you were to use it on rear disk brake set ups it would have dragging rear brakes , also the duel disk brake cylinders have more fluid capacity in the rear part of the cylinder , note small area when you fill a stock pinto cylinder , also they are different bore sizes, kind of hit and miss on none power brake cars , try a Ford Fusion cylinder that has duel disk brakes ,  close to the weigh of the car , but you still  might need a adjustable proportioning valve to fine tune it , only a drive test will find out for sure , good luck