Going crazy on this; I've joined a 55-56 MoPar group on "surfacebook" & it seems most people think as short as possible, it's only about replacing the whole rear axel...
Thinking a wee bit longer makes me remember many cars I've had & the backing plate was almost rusted away, so the steel can't be that awfully high quality as on Studebakers, = I'll make my own to fit the newer brake parts + the axel, shouldn't be that awfully impossible!
Thou I find it strange; it's a model that's lived for 66 years but there's not one(!) single person anywhere who's done this before???
"Ah no, let's get a Ford axel instead" seems quite more common.
Monday is the day I'm gonna pick her up... Wonder what name she's gonna have...