Ignore the valve covers-they're for a different engine. Our visit to World Products was early enough in the development of the Motown aluminum engine that the correct valve covers weren't available. Nevertheless, what you see is what you get out of the crate. World says the engines is good for about 535 hp, 540 lb-ft of torque, and 6,300 rpm. We know they sandbag their power numbers, too, so we wouldn't be surprised if the true numbers were a little higher. Not bad for an assembly that ways a mere 435 pounds!