Your picture is from a thread of mine. I have them there are 2 different makes. They seamed to have changed in mid 72. But I have gathered different makes from different years stripping cars over the years. The rebuild kits are available . The one on the left in the third picture is a "Weather Head" the one on the right isa "Kelsey Hayes" Which is harder to find that style.
I used the Kelsey Hayes style on my orange Duster race car with single piston brakes Kelsey Hayes disc brakes and an Aluminum 15/16 master from 87 dodge ram . That car would stop on a dime with no brake fade .
The Weather Head style I have used on all of the 4 piston Kelsey Hayes brakes. That is what was most seen on the 71 73 cars. That is the style you have pictured I used on the bronze Duster
The kits are available from this link to the rebuild kits. If I have any originals to sell they are $100 for the Weather heads.
1970 - 1976 Mopar Combination Valve Rebuild | Muscle Car Research LLC
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