Now that I think about it, the parking brake cables for Bendix brakes are different than Huck brakes, so cable I pointed you at won't work without modifying your backing plates. There was another member here (can't remember his handle

) that was going thru the same exercise, converting Huck backing plates to use the Bendix parking brake cable. I'll see if I can hunt that down.
[on edit] Found the thread I was thinking of
here.Turns out he was modifying a later (56) backing plate to work with a '51 brake cable. Disregard what I said about Huck parking brake cables being different. I don't know if that's the case.