A body inner fenders different after 1974?

Thanks for all who provided the info on the difference with the inner fenders. I will see if I can find a used set for the correct year. I wonder if the AMD ones are patterned after the 72 and up since they only have one type of inner fender that they are selling.
You asked about using 75's in a 73. I saw nothing here to say you couldn't use them...