Your help is needed once again

Hi Guys, once again help is needed and grateful, this is my plan.I have aiready got from AAR fiberglass a scoop, hood, truck lid and back and front bumpers. They are pricey, but i think that they make the best fiberglass product in the U.S.A in (I.M.O). I said to myself , the hell with it , i came this far so iam going all the way, they dont make dart sport fenders for a 1974 dodge dart sport, but i got information that 1973 plymouth duster to 1976 fenders will fit the dart sport, is this true? If they will fit i will order these fenders from aar, if they wont will some one clear up the information because i dont want to order parts that wont fit my car, Thanks in advance Newathis(Dave)