Best thing to do is to remove one front and one rear drum, as if to inspect things and not disassemble anything, to physically measure the width of the brake shoes. Then, on the outside edge of the drum, there should be a cast-into spec of "Masimum diameter of __.____". That will give you the diameter you need (i.e., 11") and then the measureed width of the shoes. THEN order things up as desired.
Just some obervations,
CBODY67