Speaking to the Press Association at a press conference today, McAllister said:
"We had a successful spell as players in the same team at Leeds United and I worked under Gordon when he was manager at Coventry, and we have been friends a long while.
"I am really excited about coming here. Everything is in place here to get better. Gordon has been my boss before, but I respect him and his thoughts on the game.
"We had a good understanding as players - arguments and fights, but the ethos and the way the game is played and the enthusiasm for the game, we are quite similar."
Picture copyright of FootyMad