This isn't complete but here is what I have from Detroit. George Cannon took over from Sheik in 1981.
Cannon @ Detroit, MI – Cobo Hall – March 7, 1981
Gino Brito d. Santos #2
John Bonello vs. Don Kent
Luis Martinez d. Sailor White
The Destroyer d. Dark Angel
Sweet Ebony Diamond d. Swede Hanson
Greg Valentine d. Dino Bravo by DQ
Cannon @ Detroit, MI - Cobo Hall - May 2, 1981
Kasavubu fought Luis Martinez to a draw
Billy Two Eagles fought Hans Mueller to a draw
Great Wojo d. Pierre LeFebvre
Dino Bravo fought Michel DuBois to a draw
Gino Brito d. The Destroyer
Hartford Love d. Iron Sheik by DQ
Don Kent d. Edouard Carpentier
Cannon @ Detroit, MI - Cobo Hall - January 16, 1982
Jerry Graham Jr. d. Great Wojo by DQ
Gino Brito & Al Costello d. The Convicts
Chris Carter fought Mohammad Saad to a draw
John Bonello fought Frankie Laine to a draw
Mighty Igor d. The Hangman
Cannon @ Detroit, MI - Cobo Hall - February 27, 1982
The Patriot d. Chris Curtis
Pete Caparella & Great Wojo d. Smasher Stone & Zoltan Thunder
Dominic DeNucci d. Bobby Golden
Muhammad Saad d. Mike Anthony
Gino Brito d. Sailor White by DQ
Frankie Laine d. John Bonello
Mighty Igor d. The Hangman
Cannon @ Detroit, MI - Cobo Hall - March 27, 1982
Frankie Laine d. Troy Alexander
John Bonello d. Chris Carter by DQ
Muhammad Saad d. The Patriot
Judy Martin d. Kandi Malloy
Gino Brito & Dominic DeNucci d. Hans Schroeder & Sailor White by DQ
Great Wojo d. Johnny Valiant
Mighty Igor d. The Hangman
Cannon @ Detroit, MI – Cobo Hall – October 9, 1982
Candi Divine fought Diane Von Hoffman to a draw
Dominic DeNucci & Great Wojo d. Bobby Colt & Don Kent by DQ
Billy Jackson d. Bull Johnson
Bobo Brazil d. Eddy Mansfield
Bruno Sammartino Jr. d. Johnny Valiant
Chris Carter d. John Bonello
Cannon @ Detroit, MI – March 19, 1983
The Destroyer d. Gerry Ho
Candi Divine d. Diana Von Hoffman
Mighty Igor d. Jerry Graham Jr.
Dino Bravo, Gino Brito, & Dominic DeNucci d. Mr. Hito, Ringo Mercenary, & Johnny Valiant
Billy Robinson d. Bobo Brazil by countout
The Bruiser battled Greg Wojokowski to a double countout
Cannon @ Detroit, MI - Cobo Hall - May 7, 1983
Mighty Igor d. Johnny Valiant
Gino Brito d. Sailor White by DQ
Don Kent d. Dominic DeNucci
Jerry Graham Jr. & Great Wojo d. Bobo Brazil & The Bruiser
Billy Robinson d. Jacques Rougeau
That's all I got before Vince bought out Cannon.