Actually "all" of the other LS engines are not LS engines, they just get that nomenclature as it easily understood as genIII engines. The only LS engines are the 5.7 LS1, the 5.7 LS2, and the Z06 LS7. "All" the other genIII engines (the 4.8, 5.3, iron 5.7, and the 6.0) are just genIII engines.
The LS2 is very similar to the LS1, some head modifications and oiling issues resolved but the LS7 is a truly unique piece of automotive genius, do a google on Z06/LS7.
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Dennis
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