Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_90 ( rounds VARCHAR, engine VARCHAR, chassis VARCHAR )

### Question ###
Name the round for engine of ford cosworth dfv 3.0 v8 with chassis fo 751

### Accurate SQL ###

SELECT rounds FROM table_name_90 WHERE engine = "ford cosworth dfv 3.0 v8" AND chassis = "751"