CREATE TABLE table_name_22 (start VARCHAR(255), entrant VARCHAR(255), engine VARCHAR(255), year VARCHAR(255))
What start has a ford cosworth dfx as the engine, a year later than 1981, and kraco enterprises as the entrant?
    
SQL: SELECT start FROM table_name_22 WHERE engine = "ford cosworth dfx" AND year > 1981 AND entrant = "kraco enterprises"