There's nothing quite as ''in-your-face'' as a big-inch rat motor. With a much larger displacement than any factory big block Chevrolet offering, World's 509ci and 540ci Merlin powerplants gives you ground-pounding horsepower and torque at a moderate price. World Products famed Merlin block is the foundation for these engines. They have a number of important features not found in OEM blocks that help produce extra power with an exceptional level of reliability. Improvements in cooling, oiling and manufacturing procedures. The Merlin cylinder heads are likewise far superior to factory offerings both in flow characteristics and cooling. Each engine is dyno tested to assure performance at or above published figures.

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