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The best info we have says the LS3 will be a slightly uprated version of the 6.2 liter L92 truck engine. This is a very good engine, stronger than the LS2, better flowing heads, and designed to support displacement on demand (yes!). It is strong enough that it will also serve as the basis for the supercharged 650 hp LS9 to be installed in the upcoming Super Vette.
