I don't know what broker you are using but when I sell stock, if I don't want to use FIFO which is the default, I tell them exactly what shares to sell. If I want a short term gain or loss, I sell those. If I want a long term gain or loss I sell those. Brokers do this all the time. Sit down with your broker and explain what you want to do. I have already done just that kind of sale this year and many times last year. I have always done this type of stategy with all of the brokers I have used.
