CREATE TABLE table_70665 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

what is the engine that saw a Chassis of porsche 718, and 0 points, prior to 1964?
SELECT "Engine" FROM table_70665 WHERE "Chassis" = 'porsche 718' AND "Points" = '0' AND "Year" < '1964'
SELECT "Engine" FROM "table_70665" WHERE "Chassis" = 'porsche 718' AND "Points" = '0' AND "Year" < '1964'