My dad met Smokin' Joe at a sportsman's dinner back in the late 70s. He really enjoyed that as he was more of a fan of Joe's than any of the other heavyweights at the time.
This link is to a BBC video from the late 80s. Joanna Lumley interviews George Foreman, Smokin' Joe and Ali. It was right at the time when Foreman had staged his first comeback.
Well worth a watch.
http://news.bbc.co.uk/sport2/hi/boxing/15616563.stm