That actually is a good way to look at it. Replace the 76-78 French Open results with the 75-77 U.S Open. Only years U.S Open was on clay and had it the best possible fields available at the time, and French Open on the womens side was a farce those years anyway. Even Sue Barker laughed at it after she won the French in 76. Then the new hypothetical becomes the U.S Open those 3 years on fast hard courts which would have been interesting between Evert, Goolagong, King, and to a lesser extent pre-prime Martina, aging Court, and Wade.