GM Big Block Compatible 540 c.i. Pro-Series Engine - Short Block

This BluePrint PS5401 GM Big Block compatible performance short block engine has been dyno tested with specific components to produce 670 horsepower and 660 torque. It features a forged crank and pistons, a high-strength cast iron block, and a splayed 4-bolt main.

• The description claims the engine produces 670 horsepower and 660 torque when dyno tested with specific components.