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Rat motors are supposed to be expensive, but Troy put his together for $5,000. He picked up a fully prepped 454 block from his machinist buddy for $500. The Scat rotating assembly was purchased new, but he bought the Dominator and intake from a swap meet. A low-mount alternator helps de-clutter the engine bay. Total output? Enough to propel a 3,250-pound car to 11.70s in 100-degree heat.