[5] One of the top "heels" in the Montreal-area during the 1970s, an estimated 29,000 were in attendance when he and André the Giant fought to a no contest at the 1973 Grand Prix Wrestling Stadium Show at Jarry Park in July 1973.
[4] Later that month, Poisson would appear in the World Wide Wrestling Federation as Louis Cyr defeating Mike Paidousis at the Zembo Mosque in Harrisburg, Pennsylvania on January 30, 1976.
On February 25, he and Crusher Blackwell lost a 2-of-3 falls match to Dominic DeNucci and André the Giant at the Westchester Civic Center in White Plains, New York.
Making another attempt to capture the WWWF World Tag Team Championship with Jerry Blackwell, the two lost to Tony Parisi and Louis Cerdan in Landover, Maryland on March 22.
Eliminated by Bobo Brazil, the battle royal also included Stan Hansen, Jose Gonzalez, Haystacks Calhoun, Ernie Ladd, Superstar Billy Graham, Gorilla Monsoon, Skandor Akbar, Man Mountain Mike, Bobo Brazil, Ivan Putski, Kevin Sullivan, Jerry Blackwell, Baron Mikel Scicluna, The Executioners and WWWF Tag Team Champions Louis Cerdan & Tony Parisi.
Before leaving the promotion at the end of the month, he would substitute for Louis Cerdan in one of his last appearances aiding his longtime rival Tony Parisi in defending the WWWF World Tag Team titles against The Executioners in Landover, Maryland on May 24.
The following year, he would lose to Billy Francis, Greg Gagne and Jim Brunzell in a 6-man tag team match with Mad Dog Vachon and Baron von Raschke on February 24.