CREATE TABLE table_204_976 (id DECIMAL, "pos" TEXT, "driver" TEXT, "entrant" TEXT, "constructor" TEXT, "time/retired" TEXT, "grid" DECIMAL)

who was the top finisher that drove a cooper climax ?
SELECT "driver" FROM table_204_976 WHERE "constructor" = 'cooper-climax' ORDER BY "pos" LIMIT 1
SELECT "driver" FROM "table_204_976" WHERE "constructor" = 'cooper-climax' ORDER BY "pos" NULLS FIRST LIMIT 1