I did the rear huck to bendix conversion on my 51, after I discovered it had a 50 coded rear axle, which had a seam split.
Just bought a new later axle housing with the correct backing plates and brake hardware from a bolter here, and swapped in the axle guts - pumpkin, shafts hubs. The axle came with good parking brake cables and they fit right up to the linkage on the frame.
