I have a 73 Gremlin that came factory with front drums as a 232/904 car,now it has a 360/T10 with a AMC model 20 rear pirated from a 70 AMX and i got the spindles .calipers and rotors off a 81 Spirit,what esle would i need as far as a new proportioning valve i have a new non power master cylinder on it . Bart M. 73 Grem 360/T10