You changed what you wrote and what you quoted of me after the fact. And so this statement of yours is a lie. And in doing this you abused you moderator privileges.
The 70's era Cadillac 500 V8 makes 550 ft lbs at 1600 RPM IIRC. For an iron engine, it is relatively light, and there are several aluminum parts available. For the right airplane (P-6E, He51), it would do pretty good as direct drive.