CREATE TABLE table_70664 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Points" FLOAT)

what is the engine that saw 0 points, and a Chassis of porsche 718, in 1961?
SELECT "Engine" FROM table_70664 WHERE "Points" = '0' AND "Chassis" = 'porsche 718' AND "Year" = '1961'
SELECT "Engine" FROM "table_70664" WHERE "Chassis" = 'porsche 718' AND "Points" = '0' AND "Year" = '1961'