New GM Brake Pressure Differential Valve Rebuild Kit!

I've just added a new rebuild kit for 1967 - 1975 GM brake pressure differential valves to my inventory! I'm still researching the original applications, so please feel free to contact me with questions, corrections, or additional information if my descriptions are incorrect or incomplete. Here's a link to the kit:

1967 - 1975 GM Brake Pressure Differential Valve Rebuild Kit

and a link to a pair of technical articles that describe disassembly:

1970 GM Pressure Differential Valve Autopsy

1972 GM Pressure Differential Valve Autopsy

and a link to a technical article that describes the rebuild process:

1967 - 1975 GM Pressure Differential Valve Rebuild