1971 Distribution Block

[CNUMB]

Just re did all my brakes and this is no longer going back in.. The rear brakes locked up a few weeks back, the little piston above the spring was blocking flow to rear along the the rear center brake line. I am almost certain this is the original piece from 1971..  Anyhow it is Free just pay for shipping which in a USPS Flat rate box should be under 20 bucks in the lower 48 states..