When Lynette (Elizabeth Alderfer) says she would like to see Jack Griffin (Glenn Howerton) with a "pair of daisy dukes and a tool belt" it is a callback to Glenn Howeton's other show "It's Always Sunny in Philadelphia" where in Season 4's 12th episode "The Gang Gets Extreme: Home Makeover Edition" he wears exactly that.
Principal Durbin's brother is named Dennis Durbin, Glenn Howerton (Jack) plays Dennis Reynolds in 'Always sunny in Philadelphia' likely a nod to his character.
Jack is eating spaghetti from a plastic bag just like Charlie from Alway's Sunny in Philadelphia.