The first difference that stands out between the LSA and LT4 General Motors engines is that the first is obviously an LS, while the latter is an LT. While being of two distinct small block engine generations is a primary difference between LS and LT engines, they share some similarities as GM strives to keep the desirable aspects of its long-running LS small block while improving upon it. The popularity of LS engine swaps isn’t exactly a secret among
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