Conversation so far:
Who were the Kangaroos for Al Costello?
Costello was the creator and original member of the tag team The Fabulous Kangaroos
What did Al Costello have to do with The Fabulous Kangaroos?
Costello was the creator and original member of the tag team The Fabulous Kangaroos
How did The Fabulous Kangaroos with Al Costello perform?
Costello and Heffernan are arguably the most famous version of The Kangaroos, regarded as one of the top tag teams to ever compete in professional wrestling
How did things unfold for Al Costello and The Fabulous Kangaroos after the Stu Hart's Stampede Wrestling promotion debut?
The Fabulous Kangaroos started to travel across the United States, headlining shows wherever they went due to their ability to rile up crowds with their heel (bad guy) tactics.
What else Al Costello and The Fabulous Kangaroos do during the travel across the United States besides headlining shows?
Costello and Heffernan started working for Dory Funk’s NWA Western States promotion based in Amarillo, Texas.

Question: Were these successful ventures?
Self-contained rewrite: Was working for Dory Fnk's NWA Western States promotion successful ventures for Al Costello and The Fabulous Kangaroos?