How much horsepower does a 1974 Chevy Nova with 400 have?

The horsepower of a 1974 Chevy Nova with a 400 cubic inch engine varied depending on the specific model and options. There wasn't just one 400 engine offered. Output ranged from approximately 150 to 230 horsepower. To know the exact horsepower of a particular 1974 Nova with a 400, you'd need to look at its original specifications or the vehicle's documentation.