Dual Master Cylinder

Like Dennis, I just did this on a 64.(DRUM ALL 4 WHEELS) Ordered one for a 67 Dart did not need a prop valve.At the 3 way junction block, plug the fitting that went to the rear and union the rear line to the new master .You may have to remove the mounting studs from your single master and install in the newer one. If you go to the late model you will need a adapter to go from 4 bolt mount to 2 bolt. If I remember you have to use the adjustable push rod for the 2 bolt.