A body inner fenders different after 1974?

I need a set for a project and noticed the aftermarket ones say 67-74 for the complete ones. Have a friend who has a 75 valiant he is parting but I need them for a 73 Duster. Anyone know if they are in fact different after 1974? Thanks
I don't think there is any difference other than maybe where some stuff was mounted. So may have some holes in the wrong place. From building my 75 I can tell you some places just don't list ANYTHING after 74. Even though the parts they are selling fit 75 and 76.