Proportioning valve pictures and diagram needed

Hello,
I am looking for proportioning valve pictures and brake line diagrams for a manual disc brake front and rear drum brake 1974 Dodge Challenger. I will be adding this OEM factory system to my car in a few days. I'm not exactly sure which way this valve is suppose to be mounted to the inner fender well or what brake lines connect to which port?

Thanks in advance for your help,

Tirekickertoo