CREATE TABLE table_58176 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

Name the round for engine of ford cosworth dfv 3.0 v8 with chassis fo 751
SELECT "Rounds" FROM table_58176 WHERE "Engine" = 'ford cosworth dfv 3.0 v8' AND "Chassis" = '751'
SELECT "Rounds" FROM "table_58176" WHERE "Chassis" = '751' AND "Engine" = 'ford cosworth dfv 3.0 v8'