My ‘51 3100 has a 9” rear with the Explorer parking brakes. I used Lokar cables from the rear end to one of these:
https://www.controlcables.com/emerge...acket-b-ez200/
Then I put a standard AC Delco park brake pedal under the dash on the left kick panel:
https://www.gmpartsstore.com/oem-par...8aAuLYEALw_wcB
Control Cables made me a cable with the right ends to connect the pedal to the junction bracket. Works fine and the pedal tucks up under the dash.