11" x 2" was the HD B-body rear size, the fronts in those applications being 2.5" wide. If there were wider 11" rear drums than that, I would think that's a C-body or Imperial application. We're talking about the width of the braking surface, not overall width, right ?
My 1970 charger with the 4 speed and dana has 11x2.5 rear finned drums, and 11x 3 drums up front. I think your off a 1/2 inch.
