'75 rear bumperettes -what fits?

Found what should be good numbers in 74 book at MyMopar. Need to find pics of these now to verify
fastbacks got #3754066 for both L and R on Rear. All others Plym or Dodge got the 3754118 and 119, R and L
So far, I only found one pic with the 3754066 part number online and it has the double bump in center area like the fronts, which is definitely wrong for my back bumper if they are showing correct pic...