- Fits Mopar A, B, C and E bodies from 1960-74 with disc front and drum rear brakes. - Replaces PV6070MOP. - Universal Brass Bottom Mount Proportioning Valve Kit for disc/drum braking systems. - Bottom mount design for master cylinders, ideal for confined spaces or mounting down on the frame. - Works on almost any street rod, classic truck, or muscle car that requires compact, frame-mounted braking bias control. - Benefits: maintains proper front-to-rear brake balance for safer stopping, reduces rear-wheel lockup on disc/drum setups, and simplifies line routing with a compact brass valve. - Construction and compatibility: brass bottom-mount valve, designed for easy installation in tight spaces while preserving compatibility with existing disc-front/drum-rear configurations. - Use scenarios: 1) Restoring a 1960s-1970s Mopar A/B/C/E body with factory disc front and drum rear. 2) Installing in a street rod or classic truck where space around the master cylinder is limited. 3) Upgrading a muscle car with a frame-mounted master cylinder needing a compact, reliable proportional valve.