That carb was used on 1964 300 horse 327’s. The carb kits are readily available from Rock Auto, Carquest, Napa, Oreillys, etc. There’s also online sources for ethanol compatible kits. I personally have not purchased a kit for quite some time so I don’t know if any of the big part stores that I mentioned have ethanol compatible kits. Other members may have better advice. Good luck