CREATE TABLE table_name_29 (winner VARCHAR(255), team VARCHAR(255), circuit VARCHAR(255))
What is Winner, when Team is "R.J.MacArthur Onslow", and when Circuit is "Oran Park Raceway"?
    
SQL: SELECT winner FROM table_name_29 WHERE team = "r.j.macarthur onslow" AND circuit = "oran park raceway"