A 350 Vortec engine typically produces around 350 horsepower in its stock configuration. When bored 0.040 inches over and equipped with a Weiand 250 supercharger kit, horsepower can increase significantly, potentially reaching around 500 to 600 horsepower, depending on other modifications and tuning. However, the exact output will vary based on factors like the engine's specific setup, fuel quality, and tuning. Always consult with a performance specialist for precise estimations.
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