CREATE TABLE table_name_84 (wins INT, points VARCHAR, year VARCHAR, class VARCHAR, team VARCHAR)

What is the average wins in 250cc class for Bultaco with 8 points later than 1966?
SELECT AVG(wins) FROM table_name_84 WHERE class = "250cc" AND team = "bultaco" AND year > 1966 AND points = 8
SELECT AVG("wins") FROM "table_name_84" WHERE "250cc" = "class" AND "bultaco" = "team" AND "points" = 8 AND "year" > 1966