The current unit that most closely matches, and is easy to get, is from a 1970 Mustang. Auto Zone number NM1378. It has the minimum 1" bore which is important if you don't like a pedal that travels close to the floor before the brakes grab. The Dorman/Ranger unit is a smaller bore, not much, but enough to tell a difference. I tried both.
The only other thing is that you will have to elongate the mounting holes outward about 1/8" each side to match the mounting studs.
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