Simplify the following text for a Grade 5 native English-speaking person.
Original: The engine was not ready for the start of the 1985 season , so the team converted their M185 chassis to accept a Cosworth DFV engine for the first two races .
Simplified: The engine was not ready for the start of the , so the team converted their chassis , the M185 . They used a Cosworth DFV V8 engine for the first two races .