In 1977 hated rivals (in the WWWF) Chief Jay Strongbow and Stan Stasiak would partner up in Toronto for 4 bouts. As far as I know it only happened here, Stasiak who had been a long time heel stayed on the 'good side' after this teaming and would even earn shots against WWWF champ Superstar Graham (Dec 77) as well as AWA champ Nick Bockwinkel at MLG (Jan 78) before disappearing in Feb 78.
Strongbow would also get shots at both Superstar Graham (Jul 77, Dec 77) and Bockwinkel (Feb 78) before also leaving the Toronto scene. He would show up again on the Wildman circuit in 1980 battling The Sheik and would return to MLG with the WWF for their first show at MLG in July 1984.
In a magazine article at the time, it has the reporter asking Vince McMahon Sr if he has heard about the pairing of the two rivals, to which the promoter denies any knowledge but that 'stranger things have happened' or something to that effect.