I have a 4 wheel disc brake system installed, fronts are Viper rears are Cobra. I have what appears to be a drum brake distribution block/proportioning valve according to Inline tube. I am confused as what I should get/have for a distribution block. I am going to install a Wilwood rear brake adjustable Prop.Valve at the Master Cylinder which is a new Plastic/aluminum MoPar Perf. unit from Dr. Diff. Can anyone explain exactly what I need? Thanks,,,,Eddie