The '64 Dart GT is one of my favorites too. Liked them ever since I bought some parts off of one (a coupe) back around '79. I would have bought the whole car, but it was badly rusted out and I didn't have anywhere to store it. I still have the backup lights and their wires from it.
Have had chances to buy others since then, but none that were as nice as the one in the picture. Wonder if it has a 273 V8 or a Slant 6? Came across an interesting Dart coupe a few years back that was for sale in Mt. Airy NC - claimed to be formerly owned by Frances Bavier ("Aunt Bee" of The Andy Griffith Show). But it too was badly rusted and the celebrity connection priced it too high to make sense to buy.
When I was in school in the early 1980s I met a guy who loved the 1965 Darts (had several of them). He took me up to his dad's garage and showed me a project car that he claimed was a 1965 Dart convertible with a Hurst package. It did have gold paint and black stripes that could have been original, and a floor shifter, but it was so disassembled and had so much bodywork going on that I couldn't tell if it was authentic. He wanted to sell it to me, but typical for a college student I had no money or place to store it. I've lost contact with him and it, and I've tried to research this combination, but cannot find anything to verify it was ever produced. Has anybody ever heard of this, or was he trying to oversell me (as I suspected)?