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_67039 ( "Year" real, "Chassis" text, "Engine(s)" text, "Tyres" text, "Points" text )

### Question ###
What is the engine(s) on the car before 1978 with ensign n177 chassis?

### Accurate SQL ###

SELECT "Engine(s)" FROM table_67039 WHERE "Chassis" = 'ensign n177' AND "Year" < '1978'