Table schema:
CREATE TABLE table_name_56 (position VARCHAR, leeds_career VARCHAR, goals VARCHAR, appearances VARCHAR, nationality VARCHAR)

Question: What position does the Wales player who made more than 167 appearances, had more than 0 goals, and had a Leeds career from 1977–1982 play?
SQL: SELECT position FROM table_name_56 WHERE appearances > 167 AND nationality = "wales" AND goals > 0 AND leeds_career = "1977–1982"