Bear, this is some information I picked up on Kirkwood. He stands 6 ft 1 inc and weighs 201 pounds. He was born in Australia, and originally won fame as a golfer. He was signed in 1945 by Warner Brothers and later portrayed Joe Palooka in a series of movies produced by Allied Artists. Kirkwood is said to do all his scenes without a stand-in and was twice kayoed during some of the action scenes by former professional (Jack Roper and Hal Fieberling).
Palooka website: http://www.toonopedia.com/palooka.htm