I agree Kiki on the issue of ATP rankings in those years. In 1979, I'd put it at Borg number one, followed by McEnroe at number two and Connors at number three. Vilas did win the '79 AO. The rankings could be strange in those years and the tour was somewhat chaotic, with big WCT and Masters tourneys being played along with three big majors, the AO, and also a heavy schedule of big money unofficial tourneys.
Bjorn Borg defied analysis. No one could manufacture a man that won 6 French Open and 5 straight Wimbledon titles. - Andrew Longmore