I have a 1964 1/2 Mustang that I am looking to sell and i am trying to assess the value of it. I figured that this would be the best place to ask this question: Manufactering began March 9th, 1964 on the Mustang and the release date was April 17th, 1964. My Mustang was built on April 07, 1964. Ten days before the release date and less than a month into production. Being that my Mustang was built that early into production, does this increase the value at all?