A stock 440 from a Barracuda could range from roughly 280 hp to over 375 hp depending on the year and the specific trim level (e.g., a 440 Six Pack would be significantly more powerful than a base 440).
However, many 440s are modified. A heavily modified 440 could easily produce 500 hp, 600 hp, or even far more, depending on the extent of the modifications (cam, carburetor, intake manifold, heads, etc.).
To determine the *expected* horsepower of your specific 440 Barracuda, you'd need to:
* Identify the year and model: This helps determine the original factory horsepower rating.
* Check for modifications: Look at the engine itself for aftermarket parts. Documentation of previous work is helpful.
* Consider the condition: A well-maintained engine will produce more horsepower than a neglected one.
If you want to know the horsepower of *your* specific engine, you'd need to have it dyno tested. A dynamometer measures horsepower directly.
