CREATE TABLE table_80334 ("Year" FLOAT, "Class" CLOB, "Tyres" CLOB, "Team" CLOB, "Co-Drivers" CLOB, "Pos." CLOB, "Class Pos." CLOB)

Which tires were in Class C in years before 1983?
SELECT "Tyres" FROM table_80334 WHERE "Class" = 'c' AND "Year" < '1983'
SELECT "Tyres" FROM "table_80334" WHERE "Class" = 'c' AND "Year" < '1983'