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Starting with pro-level mechanicals is a great way to put durable, rump-busting power in your track toy. Matt's ex-Ernie Elliot small-block has all the right pieces-killer valvetrain, no-excuse cylinder heads, and rpm-friendly bottom end-to duke it out all day long. Capable of 9,000 rpm for 500 miles, durability depends mainly on how hard the engine is revved. Kept below 7,500 rpm, it will last indefinitely, assuming annual valvespring and ring changes. Power figures for this engine range from 547 rwhp without water-meth injection to 907 rwhp and 701 lb-ft with water-meth and big boost. In NASCAR trim, it put out 748 hp at the crank; boosted, it's about 1,040 hp inside the bellhousing.