74 spindles and 11.75 rotors

Just curious, so what i get from this is that the bigger disc brakes from a '73 to '83 b body will fit the '73 and up spindles with no changes other than the rotors, calipers, and the caliper mounts?
I take it that the minimum wheel size would be 15''.
Correct?
Yes and no. You'll need the bigger rotors, caliper mounts and possible calipers only if caliper mounts are different from the style of caliper you have i.e. pin style mount and you have sliding calipers. The tires, I don't know.