I know that he had for a long time a wrestling schiool, he'll be forever famous for being the guy who ripped off the ear of his opponent (Yukon Eric) during a match.
On a more personal basis, i remember a story about an uncle who was hitchicking, it was either in the late fifties or the early sixties, at the time there was still some belief that wrestling was real, anyway a car stopped to pick him off and suprise suprise it was Kowalski with his arch-nemesis Yukon Eric who was riding shotgun, they were driving to do another show.