user: Question: What is the engine(s) on the car before 1978 with Ensign N177 chassis?
Columns: ['Year', 'Chassis', 'Engine(s)', 'Tyres', 'Points']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1973.0, 'Ensign N173', 'Ford V8', 'F', '0']
SQL:

assistant: SELECT "Engine(s)" FROM "Table" WHERE "Chassis" = 'Ensign N177' AND "Year" < 1978.0;