FC and FD calipers are not the same at all.
FD calipers have a different pad design/pin design and FC rotors are much smaller than FD, thus the FD caliper is space higher.
I have both FD calipers and FC calipers and rotors sitting in my garage if you'd like a comparison....
The FC rotor is about 10.8" and the FD is about 11.6" and they are different thickness.
I cant speak the exact swap though as I'm not planning on using the FD front calipers, they are for sale though
