Like a number of the comments here, I, too, find this a little sweet with the 2:1 ratio. I used a 45% ABV bourbon, but I don't think a 100-proof rye would be enough: the ratios might just need to be adjusted. Otherwise, it's a lovely drink.
They drink versions of this cocktail in Louis Malle's 1974 film, "Lacombe, Lucien". Although according the dialogue they are "bad", not least of all because they seem to be missing egg white: "The best Pink Ladies I ever drank were at Rudy Hiden's bar. The best English bar in Paris."