Brake drums

One question is how your car wound up with 11" drums. Perhaps that was a police model option or a conversion from B/E body parts. My 1965 C-body has 11"x3" front drums. But they use larger bearings that wouldn't fit your spindle. If your interest is changing the BBP fronts, then many disk kits allow that (Wilwood, 1973+ factory design, ...).