Prior to the days of the muscle cars when manufacturers started telling outright lies about engine power to keep insurance companies from raising rates for the factory hot rods, published horsepower ratings tended to be very optimistic. Engines were HP rated on the dyno, with no accessories being powered- - - -not even a water pump! Definitely not a generator of any other engine-driven equipment. Regardless of what the advertised HP might be, I'd probably have a hard time seeing it on a dyno without the same kinds of fudge factors the factory was using. Slap any kind of decal you want on it- - - - -the true HP with the engine installed in the vehicle will be lower!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!