With parts in hand, the mechanical installation is surprisingly straightforward. The Third Gen bay is wide enough to accommodate the LS with relative ease, but you cannot just drop it in on the old mounts. You will need a set of engine mounts specifically designed for this swap, with popular options from Hooker and Dirty Dingo . Equally important is the oil pan. The truck-style pan that comes on many 5.3L and 6.0L engines will not clear the Third Gen K-member. You must swap to a shallow, rear-sump F-body (Camaro/Firebird) oil pan to ensure proper fitment .
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