Proformance Unlimited's complete LS3 376CI 550HP crate engine package dyno tested ready for installation. This build features the Aluminum LS3 Series 6 bolt block. Comes ready to install with the Muscle Car oil pan. Where new school performance meets old school looks. We have developed a complete line of fuel injected and carbureted LS based power plants to fit almost everyone’s needs. If you don’t see something you want give us a call and we will design it for you. 800-267-3940 https://www.prof
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