Conversation so far:
What did Costello do while he was away from the Kangaroos?
Heffernan returned to Australia and began working for World Championship Wrestling (the Australian version, not the North American wrestling federation) under booker Jim Barnett as a singles wrestler.

Question: Did they perform well during their time in World Championship Wrestling?
Self-contained rewrite: Did Al Costello and Heffernan perform well during their time in World Championship Wrestling?